Exam 22: Internetwork Quality of Service

A router is able to anticipate congestion and prevent applications from causing an overload.

Three categories of ISA services are: guaranteed,controlled load and ________.

The ________ is the most demanding service provided by ISA.

The routers in an internet are responsible for receiving and forwarding packets through the interconnected set of networks.

Interactive applications such as remote logon and Web access are not sensitive to delay.

RSVP takes a ________,or connectionless,approach in which the reservation state is cached information in the routers that is installed and periodically refreshed by end systems.

If the server does not know the location of the members of the multicast group,then one way to assure that the packet is received by all members of the group is to ________ a copy of each packet to each network in the configuration over the least cost route for each network.

In the ________ strategy,the source system knows the location of each member of the multicast group so the source need only send packets to those networks that contain members of the group.

A codepoint is simply a set of state information at a router that expires unless regularly refreshed from the entity that requested the codepoint.

The ________ provides a framework for the development of protocols such as RSVP to handle multimedia/multicast traffic and provides guidance to router vendors on the development of efficient techniques for handling a varied load.

The guaranteed service is the most demanding service provided by ISA.

Real-time traffic is an example of ________ traffic.

The act of sending a packet from a source to multiple destinations is referred to as ________.

When a router's buffer overflows it discards packets.

A key task of an internet is to deliver data from a source to one or more destinations with the desired QoS.

Inelastic traffic easily adapts to changes in delay and throughput across an internet.

A ________ is a distinguishable stream of related IP packets that results from a single user activity and requires the same QoS.

A good example of the ________ style is for an audio teleconference with multiple sites.

Integrated services are provided on the basis of a 6-bit label in the IP header,which classifies traffic in terms of the type of service to be given by routers for that traffic.

Packets are labeled for service handling by means of the 6-bit DS field in the IPv4 header or the IPv6 header.The value of the DS field,referred to as the ________,is the label used to classify packets for differentiated services.