Exam 15: Transport Protocols

TCP uses a ________ flow control technique.

A ________ timer is reset with each outgoing segment.If this timer ever expires the protocol entity is required to send a segment,even if it duplicates a previous one.

All of the following are ways of the receiving transport entity to cope with the flow control requirement EXCEPT:

The ________ variable represents a particular TS user at the specified host.

The receiver needs to adopt some policy concerning the amount of data it permits the sender to transmit.

The credit-based flow control mechanism of TCP was designed to enable a destination to restrict the flow of segments from a source to avoid buffer overflow at the destination.

The two facilities that TCP provides for labeling data are push and ________.

In a protocol architecture,the transport protocol sits above application and other upper-layer protocols,and just below the network or internetwork layer.

A transport protocol can be either connection oriented,such as UDP,or connectionless,such as TCP.

Connection establishment in TCP always uses a ________.

A ________ service provides for the establishment,maintenance,and termination of a logical connection between TS users.To date this is the most common type of protocol service available and has a wide variety of applications.

In the case of a single network,________ refers to an attached network device.

One header must serve to perform all protocol mechanisms.This header has a minimum length of ________ octets.

In addition to data each transmitted segment includes in its header three fields related to flow control: acknowledgment number,window,and ________.

Using ________,a sender retransmits a segment before timeout because it infers that the segment was lost.If the sender subsequently receives an acknowledgement that does not cover all of the segments transmitted before this is initiated,the sender may infer that two segments were lost from the current window and retransmit an additional segment.

Multiple users employing the same transport protocol and distinguished by port numbers or service access points is ________.

In addition to TCP,the ________ is the other transport-level protocol that is commonly used as part of the TCP/IP protocol suite.

A retransmission timer is the only timer needed for proper functioning of a transport protocol.

A TCP implementation may employ one of three retransmission strategies: First-only,Individual,and ________.

A problem with a two-way handshake is the potential loss of segments and the potential presence of obsolete segments.