Module 9b Flashcards
Chapter 15
T/F: A WLAN covers a large geographical area and is made up of many smaller networks.
False
T/F: 10Base5 cabling runs at speeds up to 1 Gbps and distances to 500 meters.
False
T/F: Phone cords are a type of twisted-pair cable and use an RJ-45 connector.
False
T/F: A punchdown tool is used to wire twisted-pair cabling to a keystone jack.
True
T/F: Switches are slowly being replaced by hubs, which are newer technology.
False
In order to terminate multiple network cables that converge in one location such as an electrical closet or server room, what should you use?
patch panel
What statement regarding satellite connections is accurate?
it requires line of sight connectivity
What version of Ethernet utilizes a fiber-optic cable and has a transmission speed of 100 Mbps?
100BaseFX
If you are experience issues reaching a target destination network, and you need to display each hop to the destination, what command should you use?
tracert
Which physical topology uses a centralized device to manage traffic on the network?
star bus
Under what circumstance might you use an Ethernet loopback plug?
to test a network cable
What is the unit of information called when a network adapter adds the source and destination MAC address to the segment of data before it is transmitted on the network?
frame
What are there twists in the wires that are used for network cabling?
the twists reduce crosstalk
If you’re looking to install Gigabit Ethernet , what cabling system would you use?
Cat-6
What statement regarding crossover cables is accurate?
It can be used to connect two PCs together
What network type covers a large campus or city?
MAN
Which of the following is true about cable Internet?
you share the cable infrastructure with your neighbors
Which statement regarding 10-Gigabit Ethernet is accurate?
it is a good choice for backbone networks
What type of network device keeps a table of the MAC addresses of the devices connected to it?
switch
What type of device do you need if you want to connect two network segments together such as a wireless network and a wired network?
bridge
What does a 1000BaseT NIC use to connect to a network cable?
RJ-45
What command will display a list of active and inactive network interfaces on Unix, Linux, and Mac OS X?
ifconfig -a
What cable system utilizes a fiber-optic cable?
1000BaseFX
What command manages user accounts on the local system in Windows?
net user
What DSL technology provides equal bandwidth in both directions?
SDSL
What two terms describe the type of network cable that is used for connecting a computer to a switch or other network device?
straight-through cable
patch cable
What two commands are used to display TCP/IP configuration on Windows and Unix / Linux / Mac OS X operating systems, respectively?
ipconfig
ifconfig
In the T568B wiring scheme, what two color pairs are used for transmit and receive on a 100BaseT network?
white/green, green
white/orange, orange
What two standards have been established for wiring twisted-pair cabling and RJ-45 connectors?
T568A
T568B
What two different types of coaxial cable have been used for cable TV?
RG-6
RG-59
broadband
a networking technology that carries more than one type of signal
throughput
the average of the actual speed of a network
ferrite clamp
a device that helps to eliminate electromagnetic interference (EMI)
latency
delays in network transmission
fast ethernet
operates at 100 Mbps and uses STP or UTP cabling, rated CAT-5 or higher
patch cable
used to connect a computer to a switch or other network device
STP
uses a covering or shield around wire pairs
switch
a device that keeps a table of MAC addresses to port mappings
repeater
a device that amplifies and retransmits signal to a wider coverage area
DSL
uses ordinary copper phone lines and a range of frequencies on the copper wire to provide Internet
What is Power over Ethernet and how might you use it?
a feature that might be available on high-end wired network adapters to allow power to be transmitted over Ethernet cable.
What does the ping command do?
tests connectivity by sending an echo request to remote computer.
What are the differences between a hub and a switch?
hub: transmits the data frame to every device that sent the frame, pass through distribution.
switch: smarter and more efficient, keeps table of MAC addresses
What is the nslookup command, and what does it do?
lets you read info from the Internet namespace by requesting info about domain name resolutions from the DNS server’s zone data
What is fiber optic cabling and what are the two types of fiber-optic cable?
transmit signals as pulses of light over glass/plastic inside protected tubing.
two types: single mode and multimode.
What are some of the considerations when deciding between Internet and DSL? Describe two.
- with cable, you share infrastructure with neighbors, with DSL you use dedicated phone line.
- DSL static over phone line, sometimes phone lines don’t qualify
What is the difference between bandwidth and throughput?
bandwidth: theoretical # of bits can be transmitted over a network at one time
throughput: average of the actual speed
Describe a WAN and give an example of a WAN.
wide area network.
large geographical area and is made up of smaller networks.
example is the Internet.
Compare a straight-through cable with a crossover cable.
straight-through: used to connect computer to a switch (or other network device)
crossover: used to connect two like devices.
difference is the way they transmit and receive lines.
What considerations should be taken for Ethernet cables that are installed in plenum areas?
plenum cable covered with Teflon is used because it does not give off toxic fumes when burned.
