Telecommunications and Network Security

Question 1

What is a datagram?

Answer 1

a single unit of IP data

Question 2

What is the purpose of the /etc/hosts.equiv file on a UNIX system?

Answer 2

It allows users on other systems to automatically log on to the configured system without re-authenticating.

Question 3

What is a pleisiochronous transmission?

Answer 3

a transmission method that uses more than one timing source, sometimes running at different speeds

Question 4

What is the maximum data transmission rate for an 802.11b wireless local area network (WLAN)?

Answer 4

11 Mbps

Question 5

Which TCP/IP configuration information must a computer on a network have before it can communicate with the Internet?

Answer 5

an IP address, a default gateway, and a subnet mask

Question 6

Which protocol is a combination of PPTP and L2F?

Answer 6

Layer 2 Tunneling Protocol (L2TP)

Question 7

Which attack sends malformed packets to the intended victim?

Answer 7

a teardrop attack

Question 8

What is a media access control (MAC) address?

Answer 8

a unique 48-bit number that is built into a NIC that connects to an Ethernet network

Question 9

Which IP header protocol value indicates the IGMP protocol?

Answer 9

2

Question 10

What is a security domain?

Answer 10

a set of resources that are managed by the same security policy and security group

Question 11

What does the acronym UDP denote?

Question 12

What does the acronym HTTP denote?

Answer 12

Hypertext Transfer Protocol

Question 13

Which type of protocols are RIP v1, RIP v2, and IGRP

Answer 13

distance-vector protocols

Question 15

At which OSI layer does HTTP operate?

Question 16

Which function does diverse routing provide?

Answer 16

routes messages through split cable or through duplicate cable facilities.

Question 17

In which versions of WAP does WAP Gap occur?

Answer 17

in versions of WAP prior to version 2.0

Question 18

At which OSI layer does IGMP operate?

Answer 18

the network layer or Layer 3

Question 20

Which frequency is used by 802.11b and 802.11g wireless access points?

Answer 20

2.4 ghz

Question 21

Which metric is used by the Routing Information Protocol (RIP) Version 2 protocol to determine the network path?

Answer 21

hop count

Question 22

What is the primary function of ICMP?

Answer 22

communication between network devices about the health of the network

Question 23

What does the acronym CIDR denote?

Answer 23

Classless Interdomain Routing

Question 24

What is the maximum data transmission rate for an 802.11a wireless local area network (WLAN)?

Answer 24

54 Mbps

Question 25

What does encapsulation do?

Answer 25

It wraps data from one layer around a data packet from an adjoining layer.

Question 26

Which type of protocol is OSPF?

Answer 26

OSPF is an interior gateway protocol that routes [Internet Protocol](http://en.wikipedia.org/wiki/Internet_Protocol "Internet Protocol") (IP) packets solely within a single routing domain ([autonomous system](http://en.wikipedia.org/wiki/Autonomous_system_%28internet%29 "Autonomous system (internet)")). a link-state protocol

Question 28

Internet Group Management Protocol

Answer 28

The **Internet Group Management Protocol** (**IGMP**) is a [communications protocol](http://en.wikipedia.org/wiki/Communications_protocol "Communications protocol") used by [hosts](http://en.wikipedia.org/wiki/Host_%28network%29 "Host (network)") and adjacent [routers](http://en.wikipedia.org/wiki/Router_%28computing%29 "Router (computing)") on [IP networks](http://en.wikipedia.org/wiki/IP_networks "IP networks") to establish multicast group memberships. IGMP is an integral part of [IP multicast](http://en.wikipedia.org/wiki/IP_multicast "IP multicast")