Networking Exam 2

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Convert 0x81A to binary

1000 0001 1010

convert binary 1100 1001 0110 0001 to hex

C961

Which fields are contained in the Ethernet frame header?

Destination address, Source Address, and Type Field

Very Small Aperture Satellite (VSAT) have made it possible to use satellites to provide Internet access to individuals or small businesses. Which of the following are true about VSAT?

Dish size less than three meters, incurs long delays and provides high data rates

ISM is an acronym that stands for

Industrial, Scientific and Medical groups

What is the purpose of a bridge?

It connects two LAN segments

The electronic device that served as the central interconnection was known as _______________ and used CSMA/CD to detect and avoid collision

a hub

Which of the following is not true concerning the individual Media Access Control address assigned to each piece of Internet interface software

assigned by IEEE

A mechanism use to connect two LAN segments and forward frames from one one segment to another is called a

bridge

A repeater is an analog device used to broadcast messages across a Wide Area Network (WAN)

false

A router is used to connect two Wide Area Networks (WAN) provided that both networks use the same technology protocols

false

Default routing is optional; a default entry is present only when there is one destination available to packets to traverse the network

false

Each hexadecimal character represents 8 bits in binary

false

Governments have reserved three areas of electromagnetic spectrum for use of Industrial, Scientific and Medical (ISM) groups using frequencies that require a license

false

Increasing the length of the transmission medium is necessary in order to send signals across greater distances on a LAN

false

Second generation of Ethernet wiring used a thinner, coaxial cable that was more flexible that Thicknet and it used an Attachment Unit Interface (AUI) to interconnect computers

false

Static routing allows automatically updates when there are major route changes

false

The next hop forwarding depends on the packet's original source and the path the packets has taken before it arrives at the particular packet switch

false

We use the term intranet to refer to an internet that is owned by a private organization and designed for global use

false

Zigbee is a wireless standard with high data rates for short distance

false

Two conceptual parts of each frame

header and payload

What is the term used to escribe an end system that connects the internet and runs applications

host

Spread spectrum transmission can be used to acheive one of the following two goals:

increase overall performance and make transmissions more immune to noise

The IEEE 802.1Q standard allows

multiple VLAN switches to be interconnected and to operate like a giant VLAN switch

What three general properties define a packet switched paradigm

no set-up required before communication begins, performance varies due to statistical multiplexing, arbitrary asynchronous communication

For a WAN to operate correctly, each switch must have a forwarding table, and must forward packets. Furthermore, values in the forwarding table must guarantee

optimal routes and universal communication

What three properties define a circuit switched paradigm

point to point communication, separate steps for circuit creation, use and termination, performance is equivalent to an isolated physical path

The purpose of a Distributed Spanning Tree (DST) is to

prevent broadcast messages from flowing in an endless loop

circuit switching provides

the illusion of an isolated physical path between sender and receiver

A layer 2 switch is an electronic device that resembles a hub but simulates a bridged network that has only one computer per LAN segment

true

A maximum length specification of the local area network is a fundamental part of LAN technology because hardware is engineered to emit a fixed amount of energy

true

Packet switching forms the basis for the internet

true

Spread spectrum techniques can help wireless LANs function in noisy environments

true

TCP/IP is the most important internetworking protocol suite and has been used on the Internet for decades

true

The expense of packet switching technologies depend on the distance they span

true

The purpose of fiber modem extension is to accept packets over the Ethernet interface and send over optical fiber, and accept packets of the fiber optic and sends them over the Ethernet interface

true

We use the term Internet, written with an uppercase I, to refer to the global Internet and associated protocols

true

Which field in an Ethernet frame provides demultiplexing that allows a computer to have multiple protocols operating simultaneously?

type

Bridges do not blindly forward a copy of each frame from one LAN to another, instead bridges

use a destination MAC address and frame to a LAN segment unless necessary


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