Networking Exam 2
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
