Exam 12: Ethernet

A problem with ________ is that capacity is wasted because the medium will generally remain idle following the end of a transmission,even if there are one or more stations waiting to transmit.

IEEE802.3b defines the operation of VLAN bridges and switches.

The sequence 10101011 is the ________ and indicates the actual start of the frame and enables the receiver to locate the first bit of the rest of the frame.

A disadvantage of Ethernet technology is the lack of availability of reliable and interoperable networking products from vendors.

________ consists of three subfields: user priority,canonical format indicator and VLAN identifier.

For shared medium hub operation there are two enhancements to the basic CSMA/CD scheme: carrier extension and ________.

Ethernet is now the preferred carrier wire line vehicle for bridging wireless technologies such as WiFi and WiMAX into local Ethernet networks.

Because it does not transmit a continuous signal between packets,making it useful in battery-powered applications,________ is designed to produce a 100- Mbps data rate over lower quality Category 3 cable.

One of the rules for CSMA/CD states,"after transmitting the jamming signal,wait a random amount of time,then attempt to transmit again".This random amount of time is referred to as the ________.

Ethernet has both a medium access control layer and a physical layer.

In the 802.3 frame format,a 7-octet pattern of alternating 0s and 1s used by the receiver to establish bit synchronization is the ________.

A VLAN ________.

The earliest medium access control technique is known as ________ and was developed for packet radio networks.

A ________ is a collection of interconnected access points with a software protocol structure that enables communication.

If the medium is idle,transmit,otherwise,if the medium is busy,continue to listen until the channel is sensed idle,then transmit immediately,are the rules of ________ carrier sense multiple access.

The p-persistent algorithm with binary exponential backoff is efficient over a wide range of loads.

By assigning the same ________ to end systems on many switches,one or more VLAN broadcast domains can be extended across a large network.

One of the strengths of the Fast Ethernet approach is that it readily supports a mixture of existing 10-Mbps LANs,100-Mbps LANs, and newer 16-Gpbs LANs.

A ________ is an administratively configured broadcast domain consisting of a subset of end stations attached to a LAN.

The maximum utilization achievable using ALOHA can far exceed that of CSMA.