ITN | Modules 14

Why is DHCP preferred for use on large networks?

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

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

It prevents sharing of files that are copyrighted.

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

DHCP uses a reliable transport layer protocol.

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?

110

161

443

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

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?

3001

6001

1500

1501

Correct! Wrong!

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

Please select 3 correct answers

ARP

DHCP

POP3

FTP

UDP

TCP

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

timing and synchronization

destination and source port numbers

destination and source physical addresses

destination and source logical network addresses

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

ACK

SYN

PSH

RST

FIN

URG

Correct! Wrong!

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

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

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

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!

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

Please select 2 correct answers

when delivery overhead is not an issue

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

when a faster delivery mechanism is needed

when applications do not need to guarantee delivery of the data

when destination port numbers are dynamic

Correct! Wrong!

What is true about the Server Message Block protocol?

Different SMB message types have a different format.

SMB messages cannot authenticate a session.

SMB uses the FTP protocol for communication.

Clients establish a long term connection to servers.

Correct! Wrong!

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

0 to 1023

1024 – 49151

256 – 1023

0 to 255

Correct! Wrong!

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

Please select 2 correct answers

Unacknowledged data packets are retransmitted.

Received data is unacknowledged.

Destination devices receive traffic with minimal delay.

Transmitted data segments are tracked.

Destination devices reassemble messages and pass them to an application.

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?

6001

4500

3001

6000

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

transport

session

application

data link

physical

presentation

network

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!

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

social networking without the Internet

resource sharing without a dedicated server

network printing using a print server

wireless networking

Correct! Wrong!

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

Both models support devices in server and client roles.

Both models have dedicated servers.

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

Both models are used only in the wired network environment.

Correct! Wrong!

What is the TCP mechanism used in congestion avoidance ?

three-way handshake

socket pair

two-way handshake

sliding window

Correct! Wrong!

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

Please select 2 correct answers

one way data flow

resource sharing without a dedicated server

decentralized resources

scalability

centralized user accounts

Correct! Wrong!

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

client-based

master-slave

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

POP3

VoIP

Correct! Wrong!

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

Please select 2 correct answers

retransmitting any unacknowledged data

acknowledging received data

reconstructing data in the order received

tracking individual conversations

identifying the applications

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 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 sends fewer acknowledgement messages in order to conserve bandwidth.

The destination decreases the window size.

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!

What is a socket?

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

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

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 sequence and acknowledgment numbers

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?

4500

6001

6000

4501

Correct! Wrong!

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

GET

ACK

POST

PUT

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

FTP

DNS

DHCP

SNMP

SMTP

HTTP

Correct! Wrong!

Which transport layer feature is used to guarantee session establishment?

TCP 3-way handshake

UDP sequence number

TCP port number

UDP ACK flag

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

transport layer

application layer

session layer

physical layer

presentation layer

data link layer

Correct! Wrong!

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

point-to-point

client/server

master-slave

peer-to-peer

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?

1000 segments

1 segment

10 segments

100 segments

Correct! Wrong!

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

a DNS server

a dedicated file server

a home router

an ISP DHCP server

Correct! Wrong!

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

DNS

SMTP

FTP

HTTP

Correct! Wrong!

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

Please select 2 correct answers

applications that need data flow control

applications that require reliable delivery

applications that need the reordering of segments

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

applications that handle reliability themselves

Correct! Wrong!

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

SMTP

HTTPS

IMAP

SMB

Correct! Wrong!

Which statement is true about FTP?

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

FTP does not provide reliability during data transmission.

FTP is a peer-to-peer application.

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

Correct! Wrong!

What is a characteristic of UDP?

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

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.

Correct! Wrong!

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

Please select 2 correct answers

allowing data transfer between two network devices

forwarding name resolution requests between servers

retrieving email messages

mapping name-to-IP addresses for internal hosts

providing IP addresses to local hosts

Correct! Wrong!

Which three statements characterize UDP? (Choose three.)

Please select 3 correct answers

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

UDP provides basic connectionless transport layer functions.

UDP relies on application layer protocols for error detection.

UDP relies on IP for error detection and recovery.

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

UDP provides sophisticated flow control mechanisms.

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

private port

source port

registered port

dynamic port

Correct! Wrong!

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

Please select 3 correct answers

HTTP

POP3

SMTP

POP

DNS

IMAP

Correct! Wrong!

What is the function of the HTTP GET message?

to upload content to a web server from a web client

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

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

to request an HTML page from a web 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!

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?

IMAP

HTTPS

POP

SMTP

Correct! Wrong!

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

Please select 3 correct answers

SMTP

SNMP

TFTP

DHCP

HTTP

FTP

Correct! Wrong!

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

Please select 3 correct answers

Window Size

Length

Checksum

Acknowledgment Number

Source Port

Sequence Number

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

HTTP

GIF

TCP

MPEG

UDP

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?

161

443

110

Correct! Wrong!

Which factor determines TCP window size?

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

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

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 randomly selects a source port number.

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

The client sends a synchronization segment to begin the session.

The client sets the window size for the session.

Correct! Wrong!

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?

client

master

transient

server

slave

Correct! Wrong!

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

Please select 2 correct answers

window

source port

sequence number

destination port

checksum

Correct! Wrong!

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

internet

network access

transport

application

Correct! Wrong!

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

to keep track of multiple conversations between devices

to assemble the segments that arrived out of order

to inquire for a nonreceived segment

to notify the remote device that the conversation is over

Correct! Wrong!

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

HTTP

SMB

DHCP

SMTP

Correct! Wrong!

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

It just sends the datagrams.

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

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

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

Correct! Wrong!

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

index

www

.com

http

Correct! Wrong!

Which protocol uses encryption?

HTTPS

DHCP

DNS

FTP

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!

What is a responsibility of transport layer protocols?

determining the best path to forward a packet

translating private IP addresses to public IP addresses

tracking individual conversations

providing network access

Correct! Wrong!

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

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.

Each request is assigned source and destination port numbers.

Correct! Wrong!

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

ICMP

FTP

DHCP

HTTP

SNMP

Correct! Wrong!

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

SNMP

POP3

SMTP

HTTP

Correct! Wrong!

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

Please select 2 correct answers

performing a cyclic redundancy check on the frame for errors

identifying the proper application for each communication stream

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

providing frame delimiting to identify bits making up a frame

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

Correct! Wrong!

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

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

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

The entire FTP message is re-sent.

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

Correct! Wrong!

Which number or set of numbers represents a socket?

192.168.1.1:80

10.1.1.15

01-23-45-67-89-AB

Correct! Wrong!

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

presentation

application

session

transport

Correct! Wrong!

What is an advantage of SMB over FTP?

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

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

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

Only with SMB can data transfers occur in both directions.

Correct! Wrong!

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

Please select 2 correct answers

responsibility for logical addressing

the creation and maintenance of dialogue between source and destination applications

closest to the end user

responsibility for physical addressing

Correct! Wrong!

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

DHCP

SMTP

HTTP

POP3

DNS

Correct! Wrong!

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

network access

session

internetwork

application

presentation

Correct! Wrong!

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

checksum

reserved

window

control bits

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

ACK

FIN

RST

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

443

161

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!

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

client/server applications

email applications

authentication services

P2P applications

Correct! Wrong!

What type of applications are best suited for using UDP?

applications that need reliable delivery

applications that require retransmission of lost segments

applications that are sensitive to delay

applications that are sensitive to packet loss

Correct! Wrong!

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

SMTP

Gnutella

Ethernet

POP

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

directing packets towards the destination network

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

conducting error detection of the contents in frames

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

Correct! Wrong!

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

the domain name mapped to mail exchange servers

the IP address for an FQDN entry

the IP address of an authoritative name server

the FQDN of the alias used to identify a service

Correct! Wrong!

Why does HTTP use TCP as the transport layer protocol?

because transmission errors can be tolerated easily

because HTTP is a best-effort protocol

because HTTP requires reliable delivery

to ensure the fastest possible download speed

Correct! Wrong!

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

Please select 3 correct answers

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

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

The message comes from a server offering an IP address.

The destination IP address is 255.255.255.255.

Only the DHCP server receives the message.

The message comes from a client seeking an IP address.

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!

ITN | Modules 14 – 15

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ITN | Modules 14 – 15

Why is DHCP preferred for use on large networks?

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?

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?

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

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

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

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

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

What is true about the Server Message Block protocol?

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

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

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?

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

Which scenario describes a function provided by the transport layer?

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

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

What is the TCP mechanism used in congestion avoidance ?

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

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)

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

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?

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?

What is a socket?

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?

What message type is used by an HTTP client to request data from 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.)

Which transport layer feature is used to guarantee session establishment?

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.)

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

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?

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

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

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

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

Which statement is true about FTP?

What is a characteristic of UDP?

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

Which three statements characterize UDP? (Choose three.)

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

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

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

What is the function of the HTTP GET message?

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?

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?

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

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

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

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?

Which factor determines TCP window size?

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

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?

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

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

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

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

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

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

Which protocol uses encryption?

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?

What is a responsibility of transport layer protocols?

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

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

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

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

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

Which number or set of numbers represents a socket?

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

What is an advantage of SMB over FTP?​

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

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

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

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

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

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?

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?

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

What is an advantage of SMB over FTP?