Acronyms Flashcards
AUP
Acceptable Use Policy: A policy that identifies what users of a network are and are not allowed to do on that network.
ACL
Access Control List: Rules typically applied to router interfaces to specify permitted and denied traffic.
A
Address: A DNS record that maps a hostname to and IPV4 Address.
ARP
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.
AES
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.
APC
Angled Phy
AD
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.
APIPA
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.
BGP
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.
CAN
Campus are network: An interconnection of networks located in nearby buildings
CSMA/CD
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.
CIDR
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.
CDMA
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.
CWDM
Courses wavelength division multiplexing: A technology that allows up to 18 channels to be connected over a dark fiber pair.
DaaS
Data as a service: A cloud-based service that uses software tools for working with data.
DoS
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.
DWDM
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.
DSL
Digital subscriber line: A group of technologies that provide highspeed data transmission over existing telephone wiring.
DRP
Disaster Recovery Plan: A documented process to execute an organization’s disaster recovery process.
DDoS
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.
DAI
Dynamic ARP Inspection: a feature that ensures that MAC addresses coordinate to the Layer 3 addresses as they should.
DNS
Domain Name System: A system that resolves a domain name to a corresponding IP address.
DHCP
Dynamic Host Configuration Protocol: A protocol that dynamically assigns IP address information to network devices.
ESP
Encapsulating Security Payload: An IPsec protocol that provides authentication, integrity, and encryption services.
