(单选题)UDP is a ( )service while TCP is a connection-oriented service.

(单选题)The UDP header has only four fields, they are( ).

(单选题)TCP service does not provide( ).

(单选题)The host that initiates the session in the Internet is labeled as ( ).

(单选题)A ( )layer protocol provides for logical communication between applications.

(单选题)The receive side of transport layer reassembles segments into messages, passes to ( ) layer.

(单选题)The port number used by HTTP is( ).

(单选题)The UDP header has only ( ) fields.

(单选题)TCP ( ) means sender won’t overflow receiver’s buffer by transmitting too much, too fast.

(单选题)Which service does UDP not provide? ( )

(单选题)The SYN segment is used for ( ).

(单选题)The Internet’s ( ) is responsible for moving packets from one host to another.

(单选题)( ) imposes constrain on the rate at which a TCP sender can send traffic into the network.

(单选题)What is the name of a network-layer packet? ( )

(单选题)What are the two most important network-layer functions in a datagram network? ( )