Acronyms

Question 1

AUP

Answer 1

Acceptable Use Policy: A policy that identifies what users of a network are and are not allowed to do on that network.

Question 2

ACL

Answer 2

Access Control List: Rules typically applied to router interfaces to specify permitted and denied traffic.

Question 3

A

Answer 3

Address: A DNS record that maps a hostname to and IPV4 Address.

Question 4

ARP

Answer 4

Adress Resolution Protocol: (request) A broadcast asking for the MAC address corresponding to a known IP address. An ARP (reply) contains the requested MAC address.

Question 5

AES

Answer 5

Advanced Encryption Standard: A symmetric block cipher implemented in hardware and software that protects sensitive or confidential data through encryption. AES offers various levels of strength.

Question 6

APC

Answer 6

Angled Phy

Question 7

AD

Answer 7

Administrative Distance: A routing protocol’s index of believability. Routing protocols with a smaller AD are considered more believable than routing protocols with a higher AD.

Question 8

APIPA

Answer 8

Automatic Private IP Addressing: A feature that allows a networked device to self assign an IP address from the 169.254.0.0/16 network. This address is usable only on the device’s local subnet.

Question 9

BGP

Answer 9

Border Gateway Protocol: A path-vector routing protocol that can use as its metric the number of autonomous system hops that must be transited to reach a destination network, as opposed to the number of required router hops. Considered to be the protocol that runs the internet.

Question 10

CAN

Answer 10

Campus are network: An interconnection of networks located in nearby buildings

Question 11

CSMA/CD

Answer 11

Carrier-sense multiple access with collision detection: A media access control method used on an Ethernet network to help prevent collisions from occurring and to recover if collisions do occur. CSMA/CD is only needed on half-duplex connections.

Question 12

CIDR

Answer 12

Classless interdomain Routing: A process that involves shortening a classful subnet mask by removing right-justified 1s from a classful mask. As a result, CIDR allows contiguous classful networks to be aggregated. Sometimes called route aggregation.

Question 13

CDMA

Answer 13

Code-division multiple access: A technology that allows several transmitters to send information simultaneously over a single communication channel so that several users can share a band of frequencies. Used as the access method in many mobile phone standards.

Question 14

CWDM

Answer 14

Courses wavelength division multiplexing: A technology that allows up to 18 channels to be connected over a dark fiber pair.

Question 15

DaaS

Answer 15

Data as a service: A cloud-based service that uses software tools for working with data.

Question 16

DoS

Answer 16

Denial of Service: A type of attack that floods a system with an excessive amount of traffic or requests, consuming the system’s processing resources and preventing the system from responding to many legitimate requests.

Question 17

DWDM

Answer 17

Dense wavelength-division multiplexing: An optical multiplexing technology used to increase bandwidth over existing fiber networks. DVDM works by combining and transmitting multiple signals simultaneously at different wavelengths on the same fiber.

Question 18

DSL

Answer 18

Digital subscriber line: A group of technologies that provide highspeed data transmission over existing telephone wiring.

Question 19

DRP

Answer 19

Disaster Recovery Plan: A documented process to execute an organization’s disaster recovery process.

Question 20

DDoS

Answer 20

Distributed denial-of-service: An attack that can increase the amount of traffic flooded to a target system. Specifically, an attacker compromises multiple systems, and those compromised systems, called zombies, can be instructed by the attacker to simultaneously launch a DDoS attack against a target system.

Question 21

DAI

Answer 21

Dynamic ARP Inspection: a feature that ensures that MAC addresses coordinate to the Layer 3 addresses as they should.

Question 22

DNS

Answer 22

Domain Name System: A system that resolves a domain name to a corresponding IP address.

Question 23

DHCP

Answer 23

Dynamic Host Configuration Protocol: A protocol that dynamically assigns IP address information to network devices.

Question 24

ESP

Answer 24

Encapsulating Security Payload: An IPsec protocol that provides authentication, integrity, and encryption services.

Question 25

EIGRP

Answer 25

Enhanced Interior Gateway Routing Protocol: A Cisco-proprietary protocol that is popular in Cisco-only networks but less popular in mixed-vendor networks.

Question 26

EGP

Answer 26

Exterior Gateway Protocol: A routing protocol that operates between autonomous systems, which are networks under different administrative control. BGP is the only EGP in widespread use today.