NWT Quiz - Chapter 9

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 decreases the window size.

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

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

• identifying the applications

• acknowledging received data

• tracking individual conversations

• retransmitting any unacknowledged data

• reconstructing data in the order received

What is the TCP mechanism used in congestion avoidance?

• three-way handshake

• socket pair

• two-way handshake

• sliding window

What is a responsibility of transport layer protocols?

• providing network access

• tracking individual conversations

• determining the best path to forward a packet

• translating private IP addresses to public IP addresses

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

• The server sends all requests through a default gateway.

• Each request is assigned source and destination port numbers.

• The server uses IP addresses to identify different services.

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

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

• FTP

• DNS

• HTTP

• POP3

• VoIP

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 assemble the segments that arrived out of order

• to keep track of multiple conversations between devices

• to inquire for a nonreceived segment

Which number or set of numbers represents a socket?

• 01-23-45-67-89-AB

• 21

• 192.168.1.1:80

• 10.1.1.15

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

• ACK

• FIN

• RST

• SYN

• URG

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.