It Essentials Chapter 8 Flash Cards

Front 1

What does DHCP stand for?

Back 1

Dynamic Host Control Protocol

Front 2

What type of copper cabling is used for telephone communications and most Ethernet networks?

Back 2

twisted pair (copper)

Front 3

What protocol is used by devices on a network to send control and error messages to computers and servers?

Back 3

ICMP (Ping uses this.)

Front 4

What does DHCP do?

Back 4

DHCP is a software utility used to dynamically assign IP addresses to network devices.

Front 5

Which fiber optic cable has a thicker core, simpler light sources (LEDs), and works well over distances of a few kilometers or less?

Back 5

multimode

Front 6

Which coaxial cable is most commonly used for cable television in the U.S.?

Back 6

RG-59

Front 7

Name a higher quality cable than RG-59, with more bandwidth and less susceptibility to interference.

Back 7

RG-6

Front 8

Which Ethernet standard used coaxial cable in networks and operated at 10 Mbps with a maximum length of 185 m (607 ft)

Back 8

10BASE-2 (Thinnet)

Front 9

Which Ethernet standard used coaxial cable in networks and operated at 10 Mbps with a maximum length of 500 m (1640.4 ft)

Back 9

10BASE-5 (Thicknet)

Front 10

What is the amount of data that can be transmitted within a fixed time period?

Back 10

bandwidth

Front 11

Which type of cabling uses glass or plastic strands to carry information as light pulses

Back 11

fiber optic

Front 12

Which type of connection uses radio signals, infrared technology, or satellite transmissions?

Back 12

wireless (WLAN)

Front 13

Name the network in which there are no dedicated servers or hierarchy among the computers.

Back 13

peer-to-peer

Front 14

Any device that sends and receives information on the network is called a _____.

Back 14

host

Front 15

What is the device that translates domain names to IP addresses?

Back 15

DNS server

Front 16

What two factors are used to determine the different categories of UTP cabling?

Back 16

the number of wires in the cable and the number of twists in the wires

Front 17

Which wireless IEEE standard operates in a radio frequency of 2.4 GHz and supports a maximum bandwidth of 54 Mbps?

Back 17

802.11g

Front 18

Which layer of the OSI model is concerned with physical addressing?

Back 18

Data Link

Front 19

Which layer of the OSI model is concerned with bits?

Back 19

Physical

Front 20

What does the T in 1000BASET stand for?

Back 20

Twisted (as in twisted copper cabling)

Front 21

What is the maximum distance UTP and STP can transmit?

Back 21

100 m

Front 22

What is the most common topology implemented today that has a single point of failure?

Back 22

star

Front 23

What is encapsulation?

Back 23

Encapsulation is the process of adding headers to data as it goes through the OSI model (things like IP addresses, MAC addresses, etc.)

Front 24

What is encryption?

Back 24

Encryption is the process of making data unreadable except to those who hold the key to unscramble it.

Front 25

What command will show the route a packet uses as it is sent to its destination?

Back 25

tracert

Front 26

Which channels in ISDN carry data?

Back 26

The B channels bear the data.

Front 27

Which channel in ISDN carries the signalling information?

Back 27

The D channel (delta) carries signalling information.

Front 28

What does SMTP do?

Back 28

Simple Mail Transport Protocol is used to send e-mail (send mail to people).

Front 29

What does POP3 do?

Back 29

POP3 is a protocol for receiving mail via a mail client like Outlook Express or Thunderbird. The mail is removed from the server once it's downloaded to the email application.

Front 30

What is the purpose of IMAP?

Back 30

IMAP is an email protocol for web-based email. When a user accesses the mail, it remains on the server and can be accessed from different computers because it is not stored locally.

Front 31

Which layer of the OSI model is responsible for how the data appears and whether it can be read by an application?

Back 31

Presentation

Front 32

What is the bandwidth of 802.11n?

Back 32

540 Mbps

Front 33

Which wireless technology uses the 5 GHz spectrum and transmits at 54 Mbps.

Back 33

IEEE 802.11a

Front 34

Which address is permanently programmed into the NIC when it's manufactured?

Back 34

MAC (Media Access Control) Address

Front 35

Which networking device uses MAC addresses to forward frames out of the port connected to the destination host?

Back 35

switch

Front 36

What is simplex?

Back 36

Simplex is a single, one-way transmission of data (like radio or TV broadcasts.)

Front 37

Which device is used to forward traffic off of a network to another network?

Back 37

router

Front 38

What is a hub?

Back 38

A hub is a multi-port networking device that receives data in one port and floods it out all of the other ports?

Front 39

What is a dotted decimal number that's used to indicate the network portion of an IP address?

Back 39

subnet mask

Front 40

What three pieces of information does a DHCP server give to a host?

Back 40

an IP address, the subnet mask and the default gateway

Front 41

What is CSMA/CD?

Back 41

It is a broadcast technology that Ethernet uses to determine if a line is clear for transmission of data. It also has mechanisms for dealing with collisions that occur when two hosts transmit at the same time.

Front 42

Which ISP technology uses existing phone lines and is slower the farther the subscriber is from the ISP?

Back 42

DSL