Exam 9: Wan Technology and Protocols

On a network,the switching devices whose purpose is to provide communication are called ________.These are connected to one another in some topology by transmission links.

The packet switching network is a distributed collection of packet switching nodes.Because the nodes are distributed,there is a time delay between a change in status in one portion of the network and knowledge of that change elsewhere.

The branches between exchanges are called ________.They carry multiple voice frequency circuits using either FDM or synchronous TDM.

With internal ________ each packet is treated independently and packets intended for the same destination may follow different routes.

Circuit switching is a transparent service.

A ________ can convert a stream of digitized voice bits into packets.

Another well known application of circuit switching is the PBX.

Circuit switching connections do not appear to attached devices as direct connections.

Circuit switching is very efficient in handling digital data.

With packet switching,a station transmits data in small blocks called ________.

A key distinguishing element of packet switching networks is whether the internal operation is datagram or ________.

Typically standards for packet-switching network interfaces do not define a virtual circuit service.

________ switching was designed to provide a more efficient facility for bursty data traffic.The attached stations must organize their data into packets for transmission.

________ switching is used in public telephone networks.

The devices attached to a network are referred to as ________.These may be computers,terminals,telephones or other communicating devices.

Each station in a network connects to a node,and the collection of nodes is referred to as a ________ network.

With circuit switching,switching and transmission resources within the network are reserved for the exclusive use of the circuit for the duration of the connection.

In a ________ network,data entering the network from a station are routed to the destination by being switched from node to node.

Three types of delays are: propagation delay,transmission time and ________ delay.

Circuit switching is the basis for private networks built on leased lines and using on site circuit switches.