(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? ( )

(单选题)IP belongs to( )layer?

(单选题)Which layer provides host-to-host services? ( )

(单选题)IPV4 has a( )bit address?

(单选题)IPv6 increases the size of the IP address from 32bit to ( ) bit.

(单选题)( ) means determining route taken by packets from source to destination?