Communications and Network Security Domain

Question 1

Provides connection-oriented data management and reliable data transfer

Answer 1

TCP

Question 2

A diagnostic tool that displays the path a packet traverses between a source and destination host

Answer 2

Traceroute

Question 3

Layering model structured into four layers (link layer, network layer, transport layer, application layer)

Answer 3

TCP/Ip or DoD model

Question 4

A method commonly used to modulate information into manageable bits that are sent over the air wirelessly

Answer 4

Spread Spectrum

Question 5

The first line of protection between trusted and untrusted networks

Answer 5

Security Perimeter

Question 6

A program which can extract data from output on a display intended for a human

Answer 6

Screen Scraper

Question 7

Represent the ability to allow for the executing of objects across hosts

Answer 7

Remote Procedure Calls (RPC)

Question 8

Involves a pair of keys - a public key and a private key - associated with an entity that needs to authenticate its identity electronically or to sign or encrypt data

Answer 8

Public-key encryption

Question 9

A basic network mapping technique that helps narrow the scope of an attack

Answer 9

Ping scanning

Question 10

Layering model structured into seven layers

Answer 10

OSI reference model

Question 11

Allow users remote access to a network via analog phone lines

Answer 11

Modems

Question 12

A client/server based directory query protocol loosely based upon X.500, commonly used for managing user information

Answer 12

Lightweight Directory Access Protocol (LDAP)

Question 13

Application Layer

- SSH/SSH2

Answer 13

Layer 7

Question 14

Presentation Layer

Answer 14

Layer 6

Question 15

Session Layer

- Socks

Answer 15

Layer 5

Question 16

Transport Layer

- SSL/TLS

Answer 16

Layer 4

Question 17

Network Layer

- IPSec

Answer 17

Layer 3

Question 18

Data-Link Layer

- PPTP, L2F, L2TP

Answer 18

Layer 2

Question 19

Physical Layer

Answer 19

Layer 1

Question 20

Provides a means to send error messages for non-transient error conditions and provides a way to probe the network in order to determine general characteristics about the network.

Answer 20

Internet Control Messsage Protocol (ICMP)

Question 21

Devices that enforce administrative security policies by filtering incoming traffic based on a set of rules

Answer 21

Firewalls

Question 22

A stateful protocol that requires two communication channels

Answer 22

File Transfer Protocol (FTP)

Question 23

The process of transforming encrypted data back into its original form, so it can be understood

Answer 23

Decryption

Question 24

Layer 2 devices that filter traffic between segments based on Media Access Control (MAC) addresses

Answer 24

Bridges

Question 25

Sublayer that provides application specific services (protocols)

Answer 25

Specific Application Service Element (SASE)

Question 26

This wireless technology spreads its signal over rapidly changing frequencies

Answer 26

Frequency Hopping Spread Spectrum (FHSS)

Question 27

A lightweight encapsulation protocol and lacks the reliable data transport of the TCP layer

Answer 27

Fibre Channel over Ethernet (FCoE)

Question 28

Multiplex connected devices into one signal to be transmitted on a network

Answer 28

Concentrators

Question 29

Sublayer that provides services for the application layer and request services from the session layer

Answer 29

Common Application Service Element (CASE)

Question 30

Serve as a gateway between a trusted and untrusted network that gives limited, authorized access to untrusted hosts

Answer 30

Bastion Hosts

Question 31

An authentication protocol used mainly in networked environments, such as ISPs, or for similar services requiring single sign-on for layer 3 network access, for scalable authentication combined with an acceptable degree of security

Answer 31

Remote Authentication Dial-In User Service (RADIUS)

Question 32

A type of wirelss network that connects several wireless LANs

Answer 32

Wireless Metropolitan Area Networks

Question 33

A wireless network made up of radio nodes organized in a mesh topology

Answer 33

Wireless mesh network

Question 34

Links two or more devices over a short distance using a wireless distribution method, usually providing a connection through an access point for Internet access

Answer 34

Wireless Local Area Network (WLAN)

Question 35

A technology that allows you to make voice calls using a broadband internet connection instead of a regular (or analog) phoneline

Answer 35

Voice over Internet Protocol (VoIP)

Question 36

An encrypted tunnel between two hosts that allows them to securely communicate over an untrusted network

Answer 36

Virtual Private Network (VPN)

Question 37

Provides a lightweight service for connectionless data transfer without error detection and correction

Answer 37

User Datagram Protocol (UDP)

Question 38

Interconnect devices within a relatively small area that is generally within a person's reach

Answer 38

Wireless Personal Area Networks (WPANs)

Question 39

A wireless technology that spreads a transmission over a much larger frequency bank, and with corresponding smaller amplitude

Answer 39

Direct Sequence Spread Spectrum (DSSS)