Systems and Networks

Question 1

• Host/Client

Answer 1

A computer or device that is connected to the internet/network.

Question 2

• Application Server

Answer 2

A server that holds applications

Question 3

• Hub

Answer 3

A networking device that forwards packets to all segments.

Question 4

• Switch

Answer 4

A networking device that has the ability to choose which segments it wants to forward the packet(s) to.

Question 5

• Router

Answer 5

Networking device that acts as the default gateway.

Question 6

• WAP

Answer 6

Wireless Access Point, device that broadcast a wired network using WI-FI, Bluetooth, etc.

Question 7

• Proxy Server

Answer 7

Server that requests resources from other servers for a user to receive.

Question 8

• Firewall

Answer 8

A device, set of devices and/or software that permits or denies off going/incoming network traffic.

Question 9

• VPN Concentrator

Answer 9

An encrypted tunnel between hosts

Question 10

• Back-up

Answer 10

Copy of data that is used to restore original data during a data loss event.

Question 11

• Repeater

Answer 11

An electronic device that receives a signal and re-amplifies it so the signal can cover longer distances

Question 12

• Access

Answer 12

This layer includes hubs and switches. It ensures packets are delivered to end user computer

Question 13

• Distribution

Answer 13

This layer includes LAN-based routers and layer 3 switches. It ensures that packets are properly routed in the network

Question 14

• Core

Answer 14

This layer includes high-end switches and backbones. It is concerned with speed and reliable delivery of packets (information).

Question 15

• Topologies

Answer 15

are the physical or logical design of a network

Question 16

• LAN

Answer 16

A computer network covering a small area such as a home or office.

Question 17

• MAN

Answer 17

The largest type of network that spans cities and/or campuses. Example of this is the internet.

Question 18

• GAN

Answer 18

Network that supports mobile communications, wireless LANS, etc via satellite.

Question 19

• OSI

Answer 19

Is a way of sub-dividing a communications system into smaller parts called layers.

Question 20

• TCP/IP

Answer 20

Is a way of sub-dividing a communications system into smaller parts called layers

Question 21

IPv4 VS IPv6

Answer 21

Both are connection-less protocol that allow you to access a network(s). The difference is IPv4 is 32-bit while IPv6 is 128-bit.

Question 22

• NMCI

Answer 22

Serves as the primary network for shore U.S. users.

Question 23

• ONENET

Answer 23

Serves as the primary network for OCONUS shore users

Question 24

• IT21

Answer 24

Serves as the primary network for all afloat commands.

Question 25

• INFOCON

Answer 25

A defense system based on the status of information systems used to defend against network attacks.

Question 26

• CNO

Answer 26

It is the actions taken via computer networks to protect, monitor, analyze and respond to network attacks that would compromise information systems.

Question 27

• NCDOC

Answer 27

Oversees and monitors networks.

Question 28

• FLTNOC

Answer 28

– Provides IP services to the fleet. (There are 4: PRNOC,UARNOC, ECRNOC and IORNOC.)

Question 29

• NCTS

Answer 29

Provides secure, reliable, and timely services to U.S. commands.

Question 30

• TBMCS

Answer 30

The system is used to track airborne resources.

Question 31

• GCCS-M

Answer 31

Tracks enemies and allies and provides a COP(Common Operational Picture).

Question 32

• DCGS-N

Answer 32

Network that provides access to GALE, GCCS-M and imagery applications

Question 33

What is the difference between HTTP and HTTPS?

Answer 33

HTTP is unsecure while HTTPS is secure.

Question 34

• VLAN

Answer 34

Segments the network so that other users can participate in their own network. An example of this is when marines ride the BHR network, yet have their own marine network.

Question 35

port FTP

Answer 35

20/21

Question 36

port SSH

Answer 36

22

Question 37

port Telnet

Answer 37

23

Question 38

port SMTP

Answer 38

25

Question 39

port DNS

Answer 39

53

Question 40

port HTTP

Answer 40

80

Question 41

port POPv3

Answer 41

110

Question 42

port HTTPS

Answer 42

443

Question 43

• ISNS

Answer 43

A high-speed information network that provides communications to personnel

Question 44

• OPSECON

Answer 44

Used to set internet capabilities for users.

Question 45

• RIVERCITY

Answer 45

Used during emergency situations to limit information being released. EX: Man Overboard, GQ, Med-Evac, etc.

Question 46

• EMCON

Answer 46

Used to reduce telecommunication signatures being sent off the ship. Set when needed to disguise ourselves.