▷ CCNA1 v7 ITN | Modules 14 - 15 Exam Answers

CCNA1 v7 Modules 14 - 15 Exam Answers

Summary

Check answers here: CCNA1 v7 ITN Modules 14 – 15: Communicating Between Networks Exam Answers. CCNA 200-301 Passed 100% !!

This exam will cover material from Modules 14- 15 Network Application Communications of the CCNA1 – Introduction to Networks v7.0 (ITN) curriculum. This exam will be scored using the Weighted Model where each MCSA (Multiple-Choice Single-Answer) is worth two points and each MCMA (Multiple-Choice Multiple-Answer) is worth one point for each correct option. Other tasks types such as fill-in-the-blank, drag and drop (matching) and Packet Tracer items may be included in this exam. For Packet Tracer tasks, you must have the latest version of Packet Tracer installed on your machine.

This exam will cover material from Modules 14 – 15 of the CCNA1 – Introduction to Networks v7.0 (ITN) curriculum.

This exam will be scored using the Weighted Model where each MCSA (Multiple-Choice Single-Answer) is worth two points and each MCMA (Multiple-Choice Multiple-Answer) is worth one point for each correct option. If more options are selected than required, the student will receive a score of zero.

CCNA1 v7 Network Application Communications Exam Answers

An author is uploading one chapter document from a personal computer to a file server of a book publisher. What role is the personal computer assuming in this network model?

master

server

slave

client

transient

Correct! Wrong!

A client creates a packet to send to a server. The client is requesting HTTPS service. What number will be used as the destination port number in the sending packet?

161

110

443

Correct! Wrong!

What are two roles of the transport layer in data communication on a network? (Choose two.)

Please select 2 correct answers

providing frame delimiting to identify bits making up a frame

tracking the individual communication between applications on the source and destination hosts

providing the interface between applications and the underlying network over which messages are transmitted

performing a cyclic redundancy check on the frame for errors

identifying the proper application for each communication stream

Correct! Wrong!

Which two protocols may devices use in the application process that sends email? (Choose two.)

Please select 3 correct answers

DNS

POP3

IMAP

POP

HTTP

SMTP

Correct! Wrong!

Which action is performed by a client when establishing communication with a server via the use of UDP at the transport layer?

The client sets the window size for the session.

The client sends a synchronization segment to begin the session.

The client randomly selects a source port number.

The client sends an ISN to the server to start the 3-way handshake.

Correct! Wrong!

What are three responsibilities of the transport layer? (Choose three.)

Please select 3 correct answers

multiplexing multiple communication streams from many users or applications on the same network

meeting the reliability requirements of applications, if any

formatting data into a compatible form for receipt by the destination devices

conducting error detection of the contents in frames

directing packets towards the destination network

identifying the applications and services on the client and server that should handle transmitted data

Correct! Wrong!

What is an example of network communication that uses the client-server model?

A user prints a document by using a printer that is attached to a workstation of a coworker.

A workstation initiates a DNS request when the user types www.cisco.com in the address bar of a web browser.

A user uses eMule to download a file that is shared by a friend after the file location is determined.

A workstation initiates an ARP to find the MAC address of a receiving host.

Correct! Wrong!

A client creates a packet to send to a server. The client is requesting SNMP service. What number will be used as the destination port number in the sending packet?

110

161

443

Correct! Wrong!

What are two characteristics of peer-to-peer networks? (Choose two.)

Please select 2 correct answers

centralized user accounts

resource sharing without a dedicated server

scalability

decentralized resources

one way data flow

Correct! Wrong!

Which three protocols or standards are used at the application layer of the TCP/IP model? (Choose three.)

Please select 3 correct answers

TCP

HTTP

GIF

MPEG

UDP

Correct! Wrong!

What is the purpose of using a source port number in a TCP communication?

to notify the remote device that the conversation is over

to keep track of multiple conversations between devices

to inquire for a nonreceived segment

to assemble the segments that arrived out of order

Correct! Wrong!

What is true about the Server Message Block protocol?

Clients establish a long term connection to servers.

SMB messages cannot authenticate a session.

Different SMB message types have a different format.

SMB uses the FTP protocol for communication.

Correct! Wrong!

Which number or set of numbers represents a socket?

10.1.1.15

01-23-45-67-89-AB

192.168.1.1:80

Correct! Wrong!

What is an advantage of SMB over FTP?

SMB clients can establish a long-term connection to the server.

Only with SMB can data transfers occur in both directions.

SMB is more reliable than FTP because SMB uses TCP and FTP uses UDP.

Only SMB establishes two simultaneous connections with the client, making the data transfer faster.

Correct! Wrong!

What does a client do when it has UDP datagrams to send?

It sends to the server a segment with the SYN flag set to synchronize the conversation.

It sends a simplified three-way handshake to the server.

It just sends the datagrams.

It queries the server to see if it is ready to receive data.

Correct! Wrong!

What are two characteristics of the application layer of the TCP/IP model? (Choose two.)

Please select 2 correct answers

closest to the end user

responsibility for logical addressing

responsibility for physical addressing

the creation and maintenance of dialogue between source and destination applications

Correct! Wrong!

Which transport layer feature is used to guarantee session establishment?

TCP 3-way handshake

TCP port number

UDP ACK flag

UDP sequence number

Correct! Wrong!

How are port numbers used in the TCP/IP encapsulation process?

If multiple conversations occur that are using the same service, the source port number is used to track the separate conversations.

Source port and destination port numbers are randomly generated.

Destination port numbers are assigned automatically and cannot be changed.

Source port numbers and destination port numbers are not necessary when UDP is the transport layer protocol being used for the communication.

Correct! Wrong!

A client creates a packet to send to a server. The client is requesting TFTP service. What number will be used as the destination port number in the sending packet?

Correct! Wrong!

Which protocol is used by a client to communicate securely with a web server?

IMAP

SMB

HTTPS

SMTP

Correct! Wrong!

A manufacturing company subscribes to certain hosted services from its ISP. The services that are required include hosted world wide web, file transfer, and e-mail. Which protocols represent these three key applications? (Choose three.)

Please select 3 correct answers

DHCP

SNMP

DNS

SMTP

HTTP

FTP

Correct! Wrong!

A client creates a packet to send to a server. The client is requesting FTP service. What number will be used as the destination port number in the sending packet?

Correct! Wrong!

Which application layer protocol uses message types such as GET, PUT, and POST?

DHCP

HTTP

SMTP

POP3

DNS

Correct! Wrong!

Which scenario describes a function provided by the transport layer?

A student is using a classroom VoIP phone to call home. The unique identifier burned into the phone is a transport layer address used to contact another network device on the same network.

A student is playing a short web-based movie with sound. The movie and sound are encoded within the transport layer header.

A corporate worker is accessing a web server located on a corporate network. The transport layer formats the screen so the web page appears properly no matter what device is being used to view the web site.

A student has two web browser windows open in order to access two web sites. The transport layer ensures the correct web page is delivered to the correct browser window.

Correct! Wrong!

Why is DHCP preferred for use on large networks?

It prevents sharing of files that are copyrighted.

It is a more efficient way to manage IP addresses than static address assignment.

DHCP uses a reliable transport layer protocol.

Hosts on large networks require more IP addressing configuration settings than hosts on small networks.

Large networks send more requests for domain to IP address resolution than do smaller networks.

Correct! Wrong!

A client creates a packet to send to a server. The client is requesting POP3 service. What number will be used as the destination port number in the sending packet?

110

Correct! Wrong!

What is a responsibility of transport layer protocols?

tracking individual conversations

translating private IP addresses to public IP addresses

providing network access

determining the best path to forward a packet

Correct! Wrong!

Which application layer protocol is used to provide file-sharing and print services to Microsoft applications?

DHCP

SMB

HTTP

SMTP

Correct! Wrong!

Which two types of applications are best suited for UDP? (Choose two.)

Please select 2 correct answers

applications that handle reliability themselves

applications that need data flow control

applications that can tolerate some data loss, but require little or no delay

applications that require reliable delivery

applications that need the reordering of segments

Correct! Wrong!

A client creates a packet to send to a server. The client is requesting SSH service. What number will be used as the destination port number in the sending packet?

Correct! Wrong!

What is the TCP mechanism used in congestion avoidance ?

sliding window

socket pair

three-way handshake

two-way handshake

Correct! Wrong!

Which three statements characterize UDP? (Choose three.)

Please select 3 correct answers

UDP relies on application layer protocols for error detection.

UDP provides sophisticated flow control mechanisms.

UDP provides basic connectionless transport layer functions.

UDP relies on IP for error detection and recovery.

UDP is a low overhead protocol that does not provide sequencing or flow control mechanisms.

UDP provides connection-oriented, fast transport of data at Layer 3.

Correct! Wrong!

A client creates a packet to send to a server. The client is requesting SMTP service. What number will be used as the destination port number in the sending packet?

110

161

443

Correct! Wrong!

Which TCP/IP model layer is closest to the end user?

internet

transport

application

network access

Correct! Wrong!

Which protocol or service uses UDP for a client-to-server communication and TCP for server-to-server communication?

SMTP

HTTP

FTP

DNS

Correct! Wrong!

Which three fields are used in a UDP segment header? (Choose three.)

Please select 3 correct answers

Acknowledgment Number

Window Size

Source Port

Length

Sequence Number

Checksum

Correct! Wrong!

A PC is downloading a large file from a server. The TCP window is 1000 bytes. The server is sending the file using 100-byte segments. How many segments will the server send before it requires an acknowledgment from the PC?

10 segments

1 segment

100 segments

1000 segments

Correct! Wrong!

Which OSI layer provides the interface between the applications used to communicate and the underlying network over which messages are transmitted?

presentation

transport

session

application

Correct! Wrong!

What do the client/server and peer-to-peer network models have in common?

Both models require the use of TCP/IP-based protocols.

Both models are used only in the wired network environment.

Both models support devices in server and client roles.

Both models have dedicated servers.

Correct! Wrong!

A client creates a packet to send to a server. The client is requesting telnet service. What number will be used as the destination port number in the sending packet?

110

443

161

Correct! Wrong!

A PC that is communicating with a web server has a TCP window size of 6,000 bytes when sending data and a packet size of 1,500 bytes. Which byte of information will the web server acknowledge after it has received four packets of data from the PC?

6001

3001

1501

1500

Correct! Wrong!

Which statement is true about FTP?

FTP does not provide reliability during data transmission.

FTP is a peer-to-peer application.

The client can download data from or upload data to the server.

The client can choose if FTP is going to establish one or two connections with the server.

Correct! Wrong!

Which two characteristics are associated with UDP sessions? (Choose two.)

Please select 2 correct answers

Destination devices receive traffic with minimal delay.

Destination devices reassemble messages and pass them to an application.

Received data is unacknowledged.

Unacknowledged data packets are retransmitted.

Transmitted data segments are tracked.

Correct! Wrong!

Which three application layer protocols use TCP? (Choose three.)

Please select 3 correct answers

TFTP

HTTP

FTP

SNMP

DHCP

SMTP

Correct! Wrong!

Network congestion has resulted in the source learning of the loss of TCP segments that were sent to the destination. What is one way that the TCP protocol addresses this?

The destination sends fewer acknowledgement messages in order to conserve bandwidth.

The source decreases the amount of data that it transmits before it receives an acknowledgement from the destination.

The source decreases the window size to decrease the rate of transmission from the destination.

The destination decreases the window size.

Correct! Wrong!

Which applications or services allow hosts to act as client and server at the same time?

P2P applications

email applications

client/server applications

authentication services

Correct! Wrong!

What important information is added to the TCP/IP transport layer header to ensure communication and connectivity with a remote network device?

destination and source physical addresses

destination and source port numbers

destination and source logical network addresses

timing and synchronization

Correct! Wrong!

Which two fields are included in the TCP header but not in the UDP header? (Choose two.)

Please select 2 correct answers

checksum

destination port

window

source port

sequence number

Correct! Wrong!

What is the function of the HTTP GET message?

to send error information from a web server to a web client

to upload content to a web server from a web client

to request an HTML page from a web server

to retrieve client email from an email server using TCP port 110

Correct! Wrong!

What is the complete range of TCP and UDP well-known ports?

256 – 1023

1024 – 49151

0 to 255

0 to 1023

Correct! Wrong!

Which two operations are provided by TCP but not by UDP? (Choose two.)

Please select 2 correct answers

tracking individual conversations

retransmitting any unacknowledged data

acknowledging received data

identifying the applications

reconstructing data in the order received

Correct! Wrong!

Which factor determines TCP window size?

the amount of data the source is capable of sending at one time

the number of services included in the TCP segment

the amount of data the destination can process at one time

the amount of data to be transmitted

Correct! Wrong!

Why does HTTP use TCP as the transport layer protocol?

to ensure the fastest possible download speed

because HTTP requires reliable delivery

because HTTP is a best-effort protocol

because transmission errors can be tolerated easily

Correct! Wrong!

The application layer of the TCP/IP model performs the functions of what three layers of the OSI model? (Choose three.)

Please select 3 correct answers

data link

presentation

physical

session

network

transport

application

Correct! Wrong!

What information is used by TCP to reassemble and reorder received segments?

port numbers

sequence numbers

fragment numbers

acknowledgment numbers

Correct! Wrong!

What is a socket?

the combination of a source IP address and port number or a destination IP address and port number

the combination of the source and destination IP address and source and destination Ethernet address

the combination of the source and destination sequence numbers and port numbers

the combination of the source and destination sequence and acknowledgment numbers

Correct! Wrong!

Which two flags in the TCP header are used in a TCP three-way handshake to establish connectivity between two network devices? (Choose two.)

Please select 2 correct answers

URG

SYN

PSH

FIN

ACK

RST

Correct! Wrong!

Which flag in the TCP header is used in response to a received FIN in order to terminate connectivity between two network devices?

SYN

RST

ACK

FIN

Correct! Wrong!

Which layer in the TCP/IP model is used for formatting, compressing, and encrypting data?

session

presentation

application

internetwork

network access

Correct! Wrong!

How does a networked server manage requests from multiple clients for different services?

Each request is assigned source and destination port numbers.

The server uses IP addresses to identify different services.

The server sends all requests through a default gateway.

Each request is tracked through the physical address of the client.

Correct! Wrong!

Which protocol uses encryption?

DHCP

FTP

HTTPS

DNS

Correct! Wrong!

What message type is used by an HTTP client to request data from a web server?

PUT

GET

POST

ACK

Correct! Wrong!

What type of applications are best suited for using UDP?

applications that are sensitive to delay

applications that are sensitive to packet loss

applications that need reliable delivery

applications that require retransmission of lost segments

Correct! Wrong!

On a home network, which device is most likely to provide dynamic IP addressing to clients on the home network?

a dedicated file server

an ISP DHCP server

a home router

a DNS server

Correct! Wrong!

A client creates a packet to send to a server. The client is requesting HTTP service. What number will be used as the destination port number in the sending packet?

Correct! Wrong!

What happens if part of an FTP message is not delivered to the destination?

The message is lost because FTP does not use a reliable delivery method.

The FTP source host sends a query to the destination host.

The part of the FTP message that was lost is re-sent.

The entire FTP message is re-sent.

Correct! Wrong!

Which protocol can be used to transfer messages from an email server to an email client?

POP3

HTTP

SNMP

SMTP

Correct! Wrong!

What part of the URL, http://www.cisco.com/index.html, represents the top-level DNS domain?

http

index

.com

www

Correct! Wrong!

A PC that is communicating with a web server has a TCP window size of 6,000 bytes when sending data and a packet size of 1,500 bytes. Which byte of information will the web server acknowledge after it has received two packets of data from the PC?

3001

6000

4500

6001

Correct! Wrong!

In what networking model would eDonkey, eMule, BitTorrent, Bitcoin, and LionShare be used?

master-slave

client-based

peer-to-peer

point-to-point

Correct! Wrong!

Which two services or protocols use the preferred UDP protocol for fast transmission and low overhead? (Choose two)

Please select 2 correct answers

HTTP

FTP

DNS

VoIP

POP3

Correct! Wrong!

What is a characteristic of UDP?

Applications that use UDP are always considered unreliable.

UDP only passes data to the network when the destination is ready to receive the data.

UDP datagrams take the same path and arrive in the correct order at the destination.

UDP reassembles the received datagrams in the order they were received.

Correct! Wrong!

Which three protocols operate at the application layer of the TCP/IP model? (Choose three.)

Please select 3 correct answers

TCP

FTP

POP3

UDP

DHCP

ARP

Correct! Wrong!

What type of information is contained in a DNS MX record?

the FQDN of the alias used to identify a service

the IP address for an FQDN entry

the domain name mapped to mail exchange servers

the IP address of an authoritative name server

Correct! Wrong!

Which field in the TCP header indicates the status of the three-way handshake process?

checksum

control bits

reserved

window

Correct! Wrong!

A PC that is communicating with a web server has a TCP window size of 6,000 bytes when sending data and a packet size of 1,500 bytes. Which byte of information will the web server acknowledge after it has received three packets of data from the PC?

6001

6000

4501

4500

Correct! Wrong!

In what two situations would UDP be better than TCP as the preferred transport protocol? (Choose two.)

Please select 2 correct answers

when applications need to guarantee that a packet arrives intact, in sequence, and unduplicated

when a faster delivery mechanism is needed

when destination port numbers are dynamic

when delivery overhead is not an issue

when applications do not need to guarantee delivery of the data

Correct! Wrong!

Which three statements describe a DHCP Discover message? (Choose three.)

Please select 3 correct answers

The destination IP address is 255.255.255.255.

All hosts receive the message, but only a DHCP server replies.

The message comes from a server offering an IP address.

Only the DHCP server receives the message.

The source MAC address is 48 ones (FF-FF-FF-FF-FF-FF).

The message comes from a client seeking an IP address.

Correct! Wrong!

Which networking model is being used when an author uploads one chapter document to a file server of a book publisher?

client/server

master-slave

point-to-point

peer-to-peer

Correct! Wrong!

Which two tasks can be performed by a local DNS server? (Choose two.)

Please select 2 correct answers

providing IP addresses to local hosts

retrieving email messages

mapping name-to-IP addresses for internal hosts

forwarding name resolution requests between servers

allowing data transfer between two network devices

Correct! Wrong!

What kind of port must be requested from IANA in order to be used with a specific application?

private port

registered port

source port

dynamic port

Correct! Wrong!

Which three layers of the OSI model provide similar network services to those provided by the application layer of the TCP/IP model? (Choose three.)

Please select 3 correct answers

session layer

data link layer

physical layer

transport layer

presentation layer

application layer

Correct! Wrong!

A wireless host needs to request an IP address. What protocol would be used to process the request?

SNMP

DHCP

HTTP

FTP

ICMP

Correct! Wrong!

When retrieving email messages, which protocol allows for easy, centralized storage and backup of emails that would be desirable for a small- to medium-sized business?

HTTPS

POP

IMAP

SMTP

Correct! Wrong!

What is a key characteristic of the peer-to-peer networking model?

wireless networking

network printing using a print server

social networking without the Internet

resource sharing without a dedicated server

Correct! Wrong!

What is a common protocol that is used with peer-to-peer applications such as WireShare, Bearshare, and Shareaza?

POP

Gnutella

SMTP

Ethernet

Correct! Wrong!

ITN | Modules 14 – 15

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CCNA3 v7 ENSA | Final Exam Answers

CCNA3 v7 ENSA | Modules 13 – 14 Exam Answers

CCNA3 v7 ENSA | Modules 9 – 12 Exam Answers

CCNA1 v7 ITN | Modules 14 – 15 Exam Answers

CCNA1 v7 Modules 14 - 15 Exam Answers

CCNA1 v7 Network Application Communications Exam Answers

An author is uploading one chapter document from a personal computer to a file server of a book publisher. What role is the personal computer assuming in this network model?

A client creates a packet to send to a server. The client is requesting HTTPS service. What number will be used as the destination port number in the sending packet?

What are two roles of the transport layer in data communication on a network? (Choose two.)

Which two protocols may devices use in the application process that sends email? (Choose two.)

Which action is performed by a client when establishing communication with a server via the use of UDP at the transport layer?

What are three responsibilities of the transport layer? (Choose three.)

What is an example of network communication that uses the client-server model?

A client creates a packet to send to a server. The client is requesting SNMP service. What number will be used as the destination port number in the sending packet?

What are two characteristics of peer-to-peer networks? (Choose two.)

Which three protocols or standards are used at the application layer of the TCP/IP model? (Choose three.)

What is the purpose of using a source port number in a TCP communication?

What is true about the Server Message Block protocol?

Which number or set of numbers represents a socket?

What is an advantage of SMB over FTP?​

What does a client do when it has UDP datagrams to send?

What are two characteristics of the application layer of the TCP/IP model? (Choose two.)

Which transport layer feature is used to guarantee session establishment?

How are port numbers used in the TCP/IP encapsulation process?

A client creates a packet to send to a server. The client is requesting TFTP service. What number will be used as the destination port number in the sending packet?

Which protocol is used by a client to communicate securely with a web server?

A manufacturing company subscribes to certain hosted services from its ISP. The services that are required include hosted world wide web, file transfer, and e-mail. Which protocols represent these three key applications? (Choose three.)

A client creates a packet to send to a server. The client is requesting FTP service. What number will be used as the destination port number in the sending packet?

Which application layer protocol uses message types such as GET, PUT, and POST?

Which scenario describes a function provided by the transport layer?

Why is DHCP preferred for use on large networks?

A client creates a packet to send to a server. The client is requesting POP3 service. What number will be used as the destination port number in the sending packet?

What is a responsibility of transport layer protocols?

Which application layer protocol is used to provide file-sharing and print services to Microsoft applications?

Which two types of applications are best suited for UDP? (Choose two.)

A client creates a packet to send to a server. The client is requesting SSH service. What number will be used as the destination port number in the sending packet?

What is the TCP mechanism used in congestion avoidance ?

Which three statements characterize UDP? (Choose three.)

A client creates a packet to send to a server. The client is requesting SMTP service. What number will be used as the destination port number in the sending packet?

Which TCP/IP model layer is closest to the end user?

Which protocol or service uses UDP for a client-to-server communication and TCP for server-to-server communication?

Which three fields are used in a UDP segment header? (Choose three.)

A PC is downloading a large file from a server. The TCP window is 1000 bytes. The server is sending the file using 100-byte segments. How many segments will the server send before it requires an acknowledgment from the PC?

Which OSI layer provides the interface between the applications used to communicate and the underlying network over which messages are transmitted?

What do the client/server and peer-to-peer network models have in common?

A client creates a packet to send to a server. The client is requesting telnet service. What number will be used as the destination port number in the sending packet?

A PC that is communicating with a web server has a TCP window size of 6,000 bytes when sending data and a packet size of 1,500 bytes. Which byte of information will the web server acknowledge after it has received four packets of data from the PC?

Which statement is true about FTP?

Which two characteristics are associated with UDP sessions? (Choose two.)

Which three application layer protocols use TCP? (Choose three.)

Network congestion has resulted in the source learning of the loss of TCP segments that were sent to the destination. What is one way that the TCP protocol addresses this?

Which applications or services allow hosts to act as client and server at the same time?

What important information is added to the TCP/IP transport layer header to ensure communication and connectivity with a remote network device?

Which two fields are included in the TCP header but not in the UDP header? (Choose two.)

What is the function of the HTTP GET message?

What is the complete range of TCP and UDP well-known ports?

Which two operations are provided by TCP but not by UDP? (Choose two.)

Which factor determines TCP window size?

Why does HTTP use TCP as the transport layer protocol?

The application layer of the TCP/IP model performs the functions of what three layers of the OSI model? (Choose three.)

What information is used by TCP to reassemble and reorder received segments?

What is a socket?

Which two flags in the TCP header are used in a TCP three-way handshake to establish connectivity between two network devices? (Choose two.)

Which flag in the TCP header is used in response to a received FIN in order to terminate connectivity between two network devices?

Which layer in the TCP/IP model is used for formatting, compressing, and encrypting data?

How does a networked server manage requests from multiple clients for different services?

Which protocol uses encryption?

What message type is used by an HTTP client to request data from a web server?

What type of applications are best suited for using UDP?

On a home network, which device is most likely to provide dynamic IP addressing to clients on the home network?

A client creates a packet to send to a server. The client is requesting HTTP service. What number will be used as the destination port number in the sending packet?

What happens if part of an FTP message is not delivered to the destination?

Which protocol can be used to transfer messages from an email server to an email client?

What part of the URL, http://www.cisco.com/index.html, represents the top-level DNS domain?

A PC that is communicating with a web server has a TCP window size of 6,000 bytes when sending data and a packet size of 1,500 bytes. Which byte of information will the web server acknowledge after it has received two packets of data from the PC?

In what networking model would eDonkey, eMule, BitTorrent, Bitcoin, and LionShare be used?

Which two services or protocols use the preferred UDP protocol for fast transmission and low overhead? (Choose two)

What is a characteristic of UDP?

Which three protocols operate at the application layer of the TCP/IP model? (Choose three.)

What type of information is contained in a DNS MX record?

What is an advantage of SMB over FTP?