Modules 14 – 15 (Version 7.00)

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 an ISN to the server to start the 3-way handshake.

• The client randomly selects a source port number.

• The client sends a synchronization segment to begin the session.

Which transport layer feature is used to guarantee session establishment?

• UDP ACK flag

• TCP 3-way handshake

• UDP sequence number

• TCP port number

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

• 0 to 255

• 0 to 1023

• 256 – 1023

• 1024 – 49151

What is a socket?

• 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

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

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?

• 1 segment

• 10 segments

• 100 segments

• 1000 segments

Which factor determines TCP window size?

• the amount of data to be transmitted

• the amount of data the destination can process at one time

• the number of services included in the TCP segment

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

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.

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

• Window Size

• Length

• Source Port

• Acknowledgment Number

• Checksum

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

• 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

• performing a cyclic redundancy check on the frame for errors

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

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

• port numbers

• sequence numbers

• acknowledgment numbers

• fragment numbers