Term Definition
ACL Access Control Lists
ADSL Asymmetrical DSL
AIM Advanced Integration Module
ANSI American National Standard Institutes
AP Access Point (to wireless network)
ARP Address Resolution Protocol
ARPANET Advanced Research Projects Agency Network
auto-MDIX automatic medium-dependent interface crossover
AUX Auxiliary (port)
BIA Burned-in Address (IEEE Ethernet MAC address as manufactured)
Bring Your Own Device:
any device, to any content, in any manner
CAM Content Addressable Memory
CCENT Cisco Certified Entry Network Technician
Cisco Certified Network Associate
routing and switching certification
CGMP Cisco Group Management Protocol
Cisco IOS Cisco Internetwork Operating System
CLI Command Line Interface
CPU Central Processing Unit
CRC Cyclic Redundancy Check value
Carrier Sense Multiple Access/Collision Avoidance.
Used in IEEE 802.11 WLAN
CSMA/CD Carrier Sense Multiple Access/Collision Detection
DHCP Dynamic Host Configuration Protocol
DNS Domain Name Service
DS Differentiated Services. Layer 3 field. Ex ToS. DSCP + ECN
DSCP Differentiated Services Code Point. First 6 bits of DS
DSL Digital Subscriber Line
ECN Explicit Congestion Notification. Last 2 bits of DS
EGP Exterior Gateway Protocol RFC 827
EH Extension Headers. IPv6
eHWIC Enhanced High-speed WAN Interface Card
EIA Electronic Industries Alliance
EIGRP Enhanced Interior Gateway Routing Protocol
EMI Electo Magnetic Interferences
FCS Frame Check Sequence (data link layer, trailer field)
FDDI Fiber Distributed Data Interface
It’s an erasable and reprogrammable ROM. it holds the
Cisco IOS images
FTP File Transfer Protocol RFC 765
FTTH Fiber-to-the-home
GUI Graphical user Interface
HTTP Hypertext Transfer Protocol
HWIC High-speed WIC
IAB Internet Architecture Board
IANA Internet Assigned Numbers Authority
ICANN Internet Corporation for Assigned Names and Numbers
Internet Control Message Protocol. layer 3
Time Exceeded
IEEE Institute of Electrical and Elctronics Engineering
IESG Internet Engineering Steering Group (in IETF)
IETF Internet Engineering Task Force
IHL Internet Header Length. layer 3
IOS Cisco Internetwork Operating system
IP Internet protocol
IPS Intrusion Prevention System
IPTV Internet Protocol Television
IRC Internet Realy Chat
IRSG Internet Research Steering Group (in IRTF)
IRTF Internet Research Task Force
ISO International Organization for Standardization
ISOC Internet Society
ISP Internet Service Provider
ISRs Integrated Service Routers
ITU International Telecommunication Union
International Telecommunications Union-Telecommunication Standardization
LAN Local Area Network
LC Lucent connector (a type of fiber optical media connetor)
LED Light Emitting Diodes
LLC Logical Link Control (data link sublayer)
lights-out management: one form of out-of-band management.
It allows a system administrator to monitor and manage servers and other network-attached equipment by remote control regardless of whether the machine is powered on, or whether an operating system is installed or functional.
MAC Media Access Control (data link sublayer)
MMF Multi mode Fiber
NAT Network Address Translation
NIC Network Interface card
NVRAM NonVolatile Random Access Memory. it holds the startup config.file
OOB Out Of Band management (tipically: modem)
OS Operating Systems
OSPF Open Shortest Path First
OTDR Optical Time Domain Reflectometer
OUI Organization Unique Identifier (IEEE Ethernet MAC address: first 3 bytes)
POST Power-On Self-Test program
QoS Quality of Service
Random Access Memory. it holds IOS, routing & arp tables,
running config.file, packet buffer
RFC Request For Comments
RFI Radio Frequency Interferences
Read Only Memory. it holds bootstrap startup program,
ROM monitor firmware (limited IOS), POST
SC Subscriber connector (a type of fiber optical media connetor)
SDRAM Synchronous Dynamic RAM
SFD Start Frame Delimiter (1 byte after the 7 byte of I3E 802.3 frame preamble)
SMF Single mode Fiber
SP Service Provider
SSID Service Set IDentifier (wi-fi id)
ST Straight Tip connector (a type of fiber optical media connetor)
Switch Virtual Interface: lack of physical hardware associated with it.
Created in software.
TAG Technical Advisory Group
TCP Transmission Control Protocol
TIA Tellecommunication Industry Association
ToS Type of Service. Layer 3. Now DS
TSP Telecommunication Service Provider
TTL Time To Limit. layer 3 IPv4
VoIP Voice Over IP
VPN Vitual Private Network
WAN Wide Area Nework
WIC WAN Interface Card
WISP Wireless Internet Service Provider
WLAN Wireless local area networks
WPAN Wireless Personal Area Network