NETWORKS

Question 1

What is a Hub?

Answer 1

Layer 1; connects segments of a LAN

Question 2

What is a Switch?

Answer 2

Layer 2; device that acts like a hub; can also route

Question 3

What is a Router?

Answer 3

Layer 3; connects two or more computer networks

Question 4

Layers of Routing; Describe ACCESS.

Answer 4

“The Desktop Layer”.

Question 5

Layers of Routing; Describe DISTRIBUTION.

Answer 5

“The Workgroup Layer”.

Question 6

Layers of Routing; Describe CORE.

Answer 6

“Backbone of the Network”.

Question 7

Describe BUS Topology:

Answer 7

Utilizes coaxial cable. Data flows to every terminal.

Question 8

Describe STAR Topology:

Answer 8

Most common. Computers connected to central switch.

Question 9

Describe RING Topology:

Answer 9

Computers connected to each other. Data passes around ring until the destination is found.

Question 10

Describe MESH Topology:

Answer 10

Interconnects every device on network. Rare; expensive.

Question 11

Define LAN:

Answer 11

Local Area Network

Question 12

Define WAN:

Answer 12

Wide Area Network

Question 13

Define MAN:

Answer 13

Metropolitan Area Network

Question 14

Define GAN:

Answer 14

Global Area Network

Question 15

List the layers of the OSI Model:

Answer 15

7 Layers,

• Physical
• Data Link
• Network
• Transport
• Session
• Presentation
• Application

Question 16

List the layers of the TCP/IP Model:

Answer 16

4 Layers;

• Network Interface
• Internet
• Transport
• Application

Question 17

State the difference between IPv4 and IPv6:

Answer 17

IPv4-32 bit

IPv6-128 bit

Question 18

Define NIPRNET:

Answer 18

Non-Secure Internet Protocol Router Network

Question 19

Define SIPRNET:

Answer 19

Secure Internet Protocol Router Network

Question 20

Define JWICS:

Answer 20

Joint Worldwide Intelligence Communications System

Question 21

What is NMCI?

Answer 21

Navy and Marine Core Intranet; CONUS

Question 22

What is ONENET?

Answer 22

OCONUS Internet

Question 23

What is IT21?

Answer 23

Ship Based tactical and warfighting network

Question 24

Give examples of High-Level Language:

Answer 24

Apple Script, C++, Java, Squirrel, Visual Basic

Question 25

Define Operating System and give examples:

Answer 25

Programs in a computer that regulate computer hardware and the ways the user controls the computer. Linux, Unix, MAC, Windows

Question 26

What is a Virus?

Answer 26

Attaches itself to a program or file so it can spread from computer to computer. A user has to execute, share the file, or send an email.

Question 27

What is a Worm?

Answer 27

Self replicates automatically from one computer to another without needing user interaction.

Question 28

What is a Dictionary Attack?

Answer 28

Entering every word in a dictionary as a password.

Question 29

What is a Brute Force Attack?

Answer 29

Trying every possible code, combination, or password until you find the right one.

Question 30

What is PKI?

Answer 30

Public Key Infrastructure

Question 31

What is DNS?

Answer 31

Domain Name Service

Question 32

What are the 3 layers of ROUTING?

Answer 32

Access, Distribution, Core

Question 33

What does OSI stand for?

Answer 33

Open Systems Interconnection

Question 34

Layer 1 of OSI model?

Answer 34

Physical; Bits

Question 35

Layer 2 of OSI model?

Answer 35

Data Link; Frames

Question 36

Layer 3 of OSI model?

Answer 36

Network; Packets

Question 37

Layer 4 of OSI model?

Answer 37

Transport; Segments

Question 38

What is a device that blocks/allows authorized and unauthorized protocols?

Answer 38

Firewall

Question 39

What is a Repeater?

Answer 39

Used to replicate signals over long distances

Question 40

What is a COMSPOT?

Answer 40

info concerning degradation of communications