Lesson 1: Introduction to Computer Networks

Question 1

Application Layer

Answer 1

Interacts with application programs that incorporate a communication component such as your Internet browser and email

Question 2

Bus Topology

Answer 2

The computers share the media (coaxial cable) for data transmission

Question 3

CSMA/CD

Answer 3

The Ethernet LAN media-access method, carrier sense multiple access with collision detection

Question 4

Data Link Layer

Answer 4

Handles error recovery, flow control (synchronization), and sequencing

Question 5

Deterministic

Answer 5

Access to the network is provided at fixed time intervals

Question 6

Firewall Protection

Answer 6

Used to prevent unauthorized access to your network

Question 7

Frame

Answer 7

Provides grouping of the information for transmission

Question 8

Host Number (or Host Address)

Answer 8

The portion of the IP address that defines the location of the networking device connected to the network; also called the host address

Question 9

Hotspots

Answer 9

A limited geographic area that provides wireless access for the public

Question 10

Hub

Answer 10

Broadcasts the data it receives to all devices connected to its ports

Question 11

IANA

Answer 11

The agency that assigns IP addresses to computer networks

Question 12

IEEE

Answer 12

Institute of Electrical and Electronics Engineers, one of the major standards-setting bodies for technological development

Question 13

Intranet

Answer 13

An internal network that provides file and resource sharing but is not accessed from the Internet

Question 14

IP Internetwork

Answer 14

A network that uses IP addressing for identifying devices connected to the network

Question 15

ipconfig /all

Answer 15

Enables the MAC address information to be displayed from the command prompt

Question 16

ISP

Answer 16

Internet service provider

Question 17

Link Integrity Test

Answer 17

Protocol used to verify that a communication link between two Ethernet devices has been established

Question 18

Local Area Network (LAN)

Answer 18

Network of users that share computer resources in a limited area

Question 19

(Media Access Control) MAC address

Answer 19

A unique 6-byte address assigned by the vendor of the network interface card

Question 20

Mesh Topology

Answer 20

All networking devices are directly connected to each other

Question 21

Multiport Repeater

Answer 21

Another name for a hub

Question 22

Network Address Translation (NAT)

Answer 22

Translates the private IP address to a public address for routing over the Internet

Question 23

Network Interface Card (NIC)

Answer 23

The electronic hardware used to interface the computer to the network

Question 24

Network Layer

Answer 24

Accepts outgoing messages and combines messages or segments into packets, adding a header that includes routing information

Question 25

OSI

Answer 25

Open system interconnect

Question 26

OSI Model

Answer 26

The seven layers describing network functions

Question 27

Overloading

Answer 27

Where NAT translates the home network’s private IP addresses to a single public IP address

Question 28

Physical Layer

Answer 28

Provides the electrical and mechanical connection to the network

Question 29

Ports

Answer 29

The interface for the networking devices

Question 30

Presentation Layer

Answer 30

Accepts and structures the messages for the application

Question 31

Private Addresses

Answer 31

IP addresses set aside for use in private intranets

Question 32

Protocol

Answer 32

Set of rules established for users to exchange information

Question 33

Range Extender

Answer 33

Device that relays the wireless signals from an access point or wireless router into areas with a weak signal or no signal at all

Question 34

Session Layer

Answer 34

Provides the control functions necessary to establish, manage, and terminate the connections

Question 35

Star Topology

Answer 35

The most common networking topology in today’s LANs where all networking devices connect to a central switch or hub

Question 36

Stateful Packet Inspection (SPI)

Answer 36

Type of firewall that inspects incoming data packets to make sure they correspond to an outgoing request

Question 37

Switch

Answer 37

Forwards a frame it receives directly out the port associated with its destination address

Question 38

TCP/IP

Answer 38

Transmission Control Protocol/Internet Protocol, the protocol suite used for internetworks such as the Internet

Question 39

Token Passing

Answer 39

A technique where an electrical token circulates around a network—control of the token enables the user to gain access to the network

Question 40

Token Ring Hub

Answer 40

A hub that manages the passing of the token in a Token Ring network

Question 41

Token Ring Topology

Answer 41

A network topology configured in a logical ring that complements the token passing protocol

Question 42

Topology

Answer 42

Architecture of a network

Question 43

Transport Layer

Answer 43

Is concerned with message integrity between source and destination

Question 44

Uplink Port

Answer 44

Allows the connection of a switch to another switch without having to use a crossover cable

Question 45

Virtual Private Network (VPN)

Answer 45

Establishes a secure network connection and is a way to protect your LAN’s data from being observed by outsiders