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CompTIA Network+ Acronyms: Full List for the N10-009 Exam
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Note: the acronym list below is current for N10-009. The video walkthrough on this page is being re-recorded for N10-009 — the great majority of acronyms are unchanged from N10-008.
Network+ Acronyms Video
These are the acronyms on the exam, either as part of the question or the answers.
We are considering using a voice-over to read out the acronyms. Let us know if that is something you would like us to do in the future.
We are currently working to put out the same thing with all the other flashcards we currently have.
The Full Acronym List
Below is a working reference of the acronyms that appear on the CompTIA Network+ exam, grouped by subject rather than alphabetically — grouping is far easier to revise from, because related terms reinforce each other. CompTIA publishes the definitive list in the exam objectives PDF on their website; use this to study and that to confirm.
Addressing and Core Protocols
Acronym
Expansion
IP
Internet Protocol
IPv4 / IPv6
Internet Protocol version 4 / version 6
TCP
Transmission Control Protocol
UDP
User Datagram Protocol
ICMP
Internet Control Message Protocol
ARP
Address Resolution Protocol
NAT
Network Address Translation
PAT
Port Address Translation
CIDR
Classless Inter-Domain Routing
VLSM
Variable Length Subnet Mask
APIPA
Automatic Private IP Addressing
DHCP
Dynamic Host Configuration Protocol
DNS
Domain Name System
FQDN
Fully Qualified Domain Name
MTU
Maximum Transmission Unit
TTL
Time to Live
MAC
Media Access Control
OUI
Organizationally Unique Identifier
Routing
Acronym
Expansion
BGP
Border Gateway Protocol
OSPF
Open Shortest Path First
EIGRP
Enhanced Interior Gateway Routing Protocol
RIP
Routing Information Protocol
IGP / EGP
Interior / Exterior Gateway Protocol
AS
Autonomous System
ECMP
Equal-Cost Multi-Path
FHRP
First Hop Redundancy Protocol
VRRP
Virtual Router Redundancy Protocol
HSRP
Hot Standby Router Protocol
MPLS
Multiprotocol Label Switching
SDN
Software-Defined Networking
SD-WAN
Software-Defined Wide Area Network
Switching and LAN
Acronym
Expansion
VLAN
Virtual Local Area Network
STP
Spanning Tree Protocol
RSTP
Rapid Spanning Tree Protocol
MSTP
Multiple Spanning Tree Protocol
LACP
Link Aggregation Control Protocol
CDP
Cisco Discovery Protocol
LLDP
Link Layer Discovery Protocol
PoE
Power over Ethernet
QoS
Quality of Service
CoS
Class of Service
DSCP
Differentiated Services Code Point
VXLAN
Virtual Extensible LAN
SVI
Switched Virtual Interface
NIC
Network Interface Card
Network Types and Topologies
Acronym
Expansion
LAN
Local Area Network
WAN
Wide Area Network
MAN
Metropolitan Area Network
CAN
Campus Area Network
PAN
Personal Area Network
WLAN
Wireless Local Area Network
SAN
Storage Area Network
VPN
Virtual Private Network
SOHO
Small Office / Home Office
DMZ
Demilitarized Zone (screened subnet)
IaaS / PaaS / SaaS
Infrastructure / Platform / Software as a Service
NFV
Network Function Virtualization
VPC
Virtual Private Cloud
Wireless
Acronym
Expansion
SSID
Service Set Identifier
BSSID
Basic Service Set Identifier
ESSID
Extended Service Set Identifier
IBSS
Independent Basic Service Set
AP
Access Point
WAP
Wireless Access Point
WPA / WPA2 / WPA3
Wi-Fi Protected Access
PSK
Pre-Shared Key
EAP
Extensible Authentication Protocol
RSSI
Received Signal Strength Indicator
SNR
Signal-to-Noise Ratio
MIMO
Multiple Input, Multiple Output
MU-MIMO
Multi-User MIMO
OFDM
Orthogonal Frequency-Division Multiplexing
RF
Radio Frequency
NFC
Near Field Communication
Services, Ports and Applications
Acronym
Expansion
HTTP / HTTPS
Hypertext Transfer Protocol / Secure
FTP / SFTP / TFTP
File Transfer Protocol / SSH FTP / Trivial FTP
SSH
Secure Shell
SMTP
Simple Mail Transfer Protocol
POP3
Post Office Protocol version 3
IMAP
Internet Message Access Protocol
SNMP
Simple Network Management Protocol
NTP
Network Time Protocol
LDAP / LDAPS
Lightweight Directory Access Protocol / Secure
SMB
Server Message Block
RDP
Remote Desktop Protocol
SIP
Session Initiation Protocol
VoIP
Voice over Internet Protocol
API
Application Programming Interface
URL / URI
Uniform Resource Locator / Identifier
Security
Acronym
Expansion
AAA
Authentication, Authorization, and Accounting
RADIUS
Remote Authentication Dial-In User Service
TACACS+
Terminal Access Controller Access-Control System Plus
MFA
Multifactor Authentication
SSO
Single Sign-On
ACL
Access Control List
IDS / IPS
Intrusion Detection / Prevention System
NAC
Network Access Control
SIEM
Security Information and Event Management
DLP
Data Loss Prevention
TLS
Transport Layer Security
IPSec
Internet Protocol Security
IKE
Internet Key Exchange
AES
Advanced Encryption Standard
PKI
Public Key Infrastructure
CA
Certificate Authority
DDoS
Distributed Denial of Service
MITM
Machine-in-the-Middle
CVE
Common Vulnerabilities and Exposures
SASE
Secure Access Service Edge
ZTNA
Zero Trust Network Access
Cabling and Physical
Acronym
Expansion
UTP / STP
Unshielded / Shielded Twisted Pair
Cat
Category (as in Cat 5e, Cat 6, Cat 6A)
RJ45 / RJ11
Registered Jack connectors
SFP / SFP+ / QSFP
Small Form-factor Pluggable transceivers
LC / SC / ST / MPO
Fibre optic connector types
SMF / MMF
Single-Mode / Multi-Mode Fibre
TDR / OTDR
Time Domain Reflectometer / Optical TDR
IDF / MDF
Intermediate / Main Distribution Frame
CSU/DSU
Channel Service Unit / Data Service Unit
DWDM / CWDM
Dense / Coarse Wavelength Division Multiplexing
PDU
Power Distribution Unit
UPS
Uninterruptible Power Supply
CRC
Cyclic Redundancy Check
EMI
Electromagnetic Interference
Operations, Monitoring and Documentation
Acronym
Expansion
SLA
Service Level Agreement
MOU
Memorandum of Understanding
NDA
Non-Disclosure Agreement
SOW
Statement of Work
RTO / RPO
Recovery Time / Point Objective
MTTR
Mean Time to Repair or Recover
MTBF
Mean Time Between Failures
BCP / DRP
Business Continuity / Disaster Recovery Plan
IaC
Infrastructure as Code
CI/CD
Continuous Integration / Continuous Deployment
SNMP trap
Unsolicited SNMP alert
NMS
Network Management System
IPAM
IP Address Management
CMDB
Configuration Management Database
How to Actually Learn These
Group, do not alphabetize. Learning all the routing protocols together builds understanding; learning them between an unrelated A and C term does not.
Expand out loud. If you cannot say what the letters stand for, you do not know it — recognition is weaker than recall, and exam distractors exploit that.
Learn the pairs and families: IDS/IPS, RADIUS/TACACS+, SMF/MMF, RTO/RPO, IGP/EGP. They are almost always tested against each other.
Watch the near-collisions. STP is Spanning Tree Protocol and Shielded Twisted Pair. MTTR has several expansions. Context decides.
Spaced repetition beats cramming for pure recall material. Fifteen minutes daily for three weeks will do more than one long session.
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