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Flashcards in ch6 Deck (36):
1

A computer network is a group of connected computers that communicate with each other.

T

2

A Local Area Network (LAN) would be used to connect computers located in Seattle and Philadelphia.

F

3

The university would employ a WAN to connect its Denver and Boulder campuses.

T

4

The way you access your accounts through an ATM is an example of a Protocol.

T

5

The NIC is the unique identifier on every device.

F

6

The core in optical fiber cables is wrapped with cladding, which contains the light rays.

T

7

The most popular protocol for LANs is the IEEE 802.3 protocol.

T

8

The 802.11b standard is the dominant WLAN standard today.

F

9

TCP/IP is an example of an LAN protocol.

T

10

An ISP functions as a gateway to the Internet.

T

11

A PPP protocol is used for networks that involved just two computers.

T

12

Broadband lines include dial-up and cable modems.

F

13

Narrowband transmission speeds typically do not exceed 56 kbps.

T

14

ADSLs have different upload and download transmission speeds.

T

15

Switches or routers may be used to connect each site to the transmission lines.

T

16

A router is a special purpose computer.

T

17

A PSDN is an access device for providing high speed Internet.

F

18

A Virtual Private Network (VPN) is a type of WAN.

T

19

A tunnel is a virtual, private pathway over a public or shared network from the VPN client to the VPN server.

T

20

VPNs enable remote access with point-to-point leased lines.

T

21

Loss rate is the frequency of problems in the communications network that necessitate data retransmission.

T

22

HTTPS is a protocol for secure communication over the Internet.

T

23

With symmetric encryption, different keys are used; one key encodes the message, and the other key decodes the message.

F

24

Symmetric encryption is simpler and much faster than asymmetric encryption.

T

25

A protocol is a standardized means for coordinating an activity between two or more entities.

T

26

The ISO developed TCP/IP layered protocol.

F

27

The Internet has adopted the TCP/IP-OSI architecture.

T

28

FTP, HTTP and SMTP are application-layer protocols.

T

29

The TCP program breaks messages down into packets.

T

30

Email programs operate primarily at the transport layer.

F

31

IP addresses are also called physical addresses.

F

32

Every NIC is given a MAC address at the factory.

T

33

IP addresses are not permanently associated with a given hardware device.

T

34

Switches employ a table to tell it where to direct traffic.

T

35

Routers use a routing table to tell it where to send traffic.

T

36

The process of changing public IP addresses into private IP addresses is called Network Address Translation (NAT).

F