Networking: Midterms

Multiplexor

The multiplexing technique that accepts inputs and assigns frequency to each device

Moving Picture Experts Group (MPEG)

The group of people that have created a set of standards to compress and store small differences between frames to form a moving video

Frequency Division Multiplexing (FDM)

The multiplexing technique that allows multiple signals to transmit on different frequencies at the same time over the same medium

SDH Multiplexing

The European equivalent to SONET?

Wavelength Division Multiplexing

The multiplexing technique that multiplexes multiple data streams onto a single fiber-optic line?

Lossy Compression

The process when data is uncompressed, but you do not have the original data

Audio Compression

The compression technique that is used in MP3 players

False

Discrete Tangent Transformation is a JPEG statement

T-1 Multiplexing

The multiplexing technique that is capable of combining 24 channels into one channel

Error Prevention

Proper shielding of cables to reduce interference

Error Detection

Despite the best prevention techniques, errors may still happen.

White Noise

 It is also known as thermal or Gaussian noise

Attenuation

The continuous loss of a signal’s strength as it travels through a medium

Impulse Noise

 It is one of the most disruptive forms of noise

Echo

The reflective feedback of a transmitted signal as the signal moves through a medium

Stop-and-Wait Error Control

 It is the simplest of the error control protocols

Jitter

The result of small timing irregularities during the transmission of digital signals

Delay Distortion

Occurs because the velocity of propagation of a signal through a medium varies with the frequency of the signal

NAK

It is a negative acknowledgement

File Serving

It is a primary function of LAN where a large storage disk drive acts as a central storage repository

Video Transfers

It is a primary function of LAN where high-speed LANs are capable of supporting video images and live video transfers

Academic Support

It is a primary function of LAN that is supported in a classroom environment

Baseband

Signals are bidirectional and move outward in both directions from the workstation transmitting data

Star

It is a topology that logically operates as a bus

Medium Access Control Protocol

It is the software that allows workstations to “take turns” transmitting data

Switch

It is a connectivity device that has intelligence and can filter out, and forward frames based on their NIC address

VLAN

It is a logical subgroup within a LAN that is created via switches and software rather than manually moving wiring from one network device to another

Spanning Tree Algorithm

In a large set of networks, a loop has been created in which a frame can circulate through the networks and actually return to the originating device

Wired Ethernet

It is the most common form of LAN today

IEEE 802.11

The original wireless standard is capable of transmitting data at 2 Mbps

WEP

The wireless standard provides either 40- or 128-bit key protection

Ad-hoc

The type of wireless LAN may also be configured without an access point

IEEE 802.11g

A standard that has backward compatibility with 802.11b

Network Operating System

The large and complex program manages the resources common on most local area networks

Novell NetWare

This operating system introduced the hierarchical directory structure

Windows NT

It is a user interface based on a popular Windows OS that has a full-service multitasking OS capable of supporting multiple servers

Primary Domain Controller

It centrally manages account information and security

Master Domain Model

It is a domain model which provides a hierarchy, but the domains at the lower hierarchy cannot contain users—only resources