Chap 9: Transport Layer

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 a synchronization segment to begin the session.

• The client sets the window size for the session

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

Which number or set of numbers represents a socket?

• 10.1.1.15

• 01-23-45-67-89-AB

• 21

• 192.168.1.1:80

Which transport layer feature is used to guarantee session establishment?

• UDP ACK flag

• TCP 3-way handshake

• TCP port number

• UDP sequence number

What OSI layer is responsible for establishing a temporary communication session between two applications and ensuring that transmitted data can be reassembled in proper sequence?

• Session

• Transport

• Data link

• network

What is an advantage of UDP over TCP?

• UDP communication is more reliable.

• UDP communication requires less overhead.

• UDP reorders segments that are received out of order.

• UDP acknowledges received data.

T/F

Multiplexing divides the data into smaller segments and enables communications from many different users to be interleaved

• True

• False

T/F

The Transport layer is responsible for managing reliability requirements of a conversation

• False

• True

T/F

UDP is also known as a best-effort delivery protocol

• True

• False

T/F

UDP is a stateful protocol that keeps track of the state of the communication session

• False

• True

POP3 port number is

• 23

• 110

• 161

• 80