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Network Technology > Chapter 14-15 Mock > Flashcards

Chapter 14-15 Mock Flashcards

1
Q

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

A

10 segments

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2
Q

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

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

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

directing packets towards the destination network

conducting error detection of the contents in frames

meeting the reliability requirements of applications, if any

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

A

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

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

meeting the reliability requirements of applications, if any

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3
Q

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

TFTP

SMTP

SNMP

FTP

HTTP

A

SMTP

HTTP

FTP

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4
Q

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

RST

ACK

SYN

FIN

A

ACK

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5
Q

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

sequence number

checksum

window

source port

destination port

A

sequence number

window

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6
Q

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

control bits

reserved

window

checksum

A

control bits

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7
Q

What is a characteristic of UDP?

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.

Applications that use UDP are always considered unreliable.​

A

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

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8
Q

Which three statements characterize UDP? (Choose three.)

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.

UDP relies on IP for error detection and recovery.

UDP relies on application layer protocols for error detection.

UDP provides basic connectionless transport layer functions.

UDP provides sophisticated flow control mechanisms.

A

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

UDP relies on application layer protocols for error detection.

UDP provides basic connectionless transport layer functions.

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9
Q

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

Checksum

Source Port

Acknowledgment Number

Length

Window Size

Sequence Number

A

Checksum

Source Port

Length

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10
Q

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

registered port

source port

private port

dynamic port

A

registered port

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11
Q

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

Destination devices reassemble messages and pass them to an application.

Unacknowledged data packets are retransmitted.

Destination devices receive traffic with minimal delay.

Transmitted data segments are tracked.

Received data is unacknowledged.

A

Destination devices receive traffic with minimal delay.

Received data is unacknowledged.

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12
Q

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.

Destination port numbers are assigned automatically and cannot be changed.

Source port and destination port numbers are randomly generated.

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

A

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

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13
Q

Why does HTTP use TCP as the transport layer protocol?

to ensure the fastest possible download speed

because transmission errors can be tolerated easily

because HTTP requires reliable delivery

because HTTP is a best-effort protocol

A

because HTTP requires reliable delivery

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14
Q

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

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

It just sends the datagrams.

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.

A

It just sends the datagrams.

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15
Q

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

A

10 segments

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16
Q

Which scenario describes a function provided by the transport layer?

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.

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

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.

17
Q

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.)

presentation layer

transport layer

session layer

physical layer

application layer

data link layer

A

presentation layer

session layer

application layer

18
Q

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?

443

80

110

161

A

161

19
Q

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 support devices in server and client roles.

Both models have dedicated servers.

Both models are used only in the wired network environment.

A

Both models support devices in server and client roles

20
Q

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

DNS

HTTP

SMTP

POP3

POP

IMAP

A

SMTP

DNS

21
Q

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

UDP

TCP

ARP

POP3

DHCP

FTP

A

POP3

DHCP

FTP

22
Q

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

SMB

HTTPS

IMAP

SMTP

A

HTTPS

23
Q

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

session

presentation

transport

application

data link

physical

network

A

session

presentation

application

24
Q

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

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.

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

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

25
Q

What is an advantage of SMB over FTP?​

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

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

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

Only with SMB can data transfers occur in both directions.

A

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

26
Q

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

A

resource sharing without a dedicated server

27
Q

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.)

DHCP

FTP

DNS

SMTP

HTTP

A

FTP

SMTP

HTTP

28
Q

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

scalability

resource sharing without a dedicated server

one way data flow

centralized user accounts

decentralized resources

A

resource sharing without a dedicated server

decentralized resources

29
Q

What is the function of the HTTP GET message?

to upload content to a web server from a web client

to request an HTML page from a web server

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

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

A

to request an HTML page from a web server

30
Q

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

HTTP

DNS

DHCP

POP3

SMTP

A

HTTP

31
Q

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

authentication services

client/server applications

P2P applications

email applications

A

P2P applications

32
Q

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

transport

presentation

application

session

A

application

33
Q

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

1501

1500

A

6001

Network Technology (14 decks)

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