Communications & Network Security

Question 1

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

Answer 1

Bastion Hosts

Question 2

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

Answer 2

Wireless Personal Area Networks (WPA)

Question 3

A type of wireless network that connects several wireless LAN’s.

Answer 3

Wireless Metropolitan Area Network

Question 4

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

Answer 4

Wireless Mesh Network

Question 5

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 5

Wireless Local Area Network

Question 6

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

Answer 6

Voice over Internet Protocol

Question 7

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

Answer 7

Virtual Private Network (VPN)

Question 8

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

Answer 8

User Datagram Protocol (UDP)

Question 9

Provides connection-oriented data management & reliable data transfer

Answer 9

Transmission Control Protocol (TCP)

Question 10

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

Answer 10

Traceroute

Question 11

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

Answer 11

TCP/IP Model

Question 12

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

Answer 12

Spread Spectrum

Question 13

Sublayer that provides application specific services (protocols)

Answer 13

Specific Application Service Element

Question 14

The first line of protection between trusted & untrusted networks

Answer 14

Security Perimeter

Question 15

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

Answer 15

Screen Scraper

Question 16

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

Answer 16

Remote Procedure Calls (RPC)

Question 17

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 17

Remote Authenication Dial-in User Services (RADIUS)

Question 18

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

Answer 18

Public Key Encryption

Question 19

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

Answer 19

Ping Scanning

Question 20

Layering model structured into seven layers (physical, data link, network, transport, session, presentation, application)

Answer 20

OSI Model

Question 21

Allow users remote access to a network via analog phone lines

Answer 21

Modems

Question 22

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

Answer 22

Lightweight Directory Access Protocol (LDAP)

Question 23

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

Answer 23

Internet Control Message Protocol (ICMP/Ping)

Question 24

Wireless technology that spreads its signal over rapidly changing frequencies

Answer 24

Frequency Hopping Spread Spectrum (FHSS)

Question 25

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

Answer 25

Firewalls

Question 26

Stateful protocol that requires two communication channels

Answer 26

File Transfer Protocol (FTP)

Question 27

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

Answer 27

Fiber Channel over Ethernet (FCoE)

Question 28

Process of transforming encrypted data back into its original form, so it can be understood.

Answer 28

Decryption

Question 29

Wireless technology that spreads a transmission over a much larger frequency band & with corresponding smaller amplitude

Answer 29

Direct Sequence Spread Spectrum (DSSS)

Question 30

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

Answer 30

Concentrators

Question 31

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

Answer 31

Bridges