| MX | Mail Exchange |
| RA | Router Advertisements |
| SFTP | Secure File Transfer Protocol |
| POP3 | Post Office Protocol version 3 |
| SDN | Software-Defined Network |
| ICMP | Internet Control Message Protocol |
| NIC | Network Interface Card |
| SIEM | Security Information and Event Management |
| VIP | Virtual IP |
| AH | Authentication Header |
| TKIP | Temporal Key Integrity Protocol |
| TLS | Transport Layer Security |
| CNAME | Canonical Name |
| QoS | Quality of Service |
| SCADA | Supervisory Control and Data Acquisition |
| RF | Radio Frequency |
| CVE | Common Vulnerabilities and Exposures |
| EAP | Extensible Authentication Protocol |
| ICS | Industrial Control System |
| SYSLOG | System Log |
| HTTP | Hypertext Transfer Protocol |
| QSFP | Quad Small Form-factor Pluggable |
| ST | Straight Tip or Snap Twist |
| APC | Angled Physical Contact |
| RSSI | Received Signal Strength Indication |
| SMTP | Simple Mail Transfer Protocol |
| VM | Virtual Machine |
| IPv6 | Internet Protocol version 6 |
| NS | Name Server |
| SIP | Session Initiation Protocol |
| CIDR | Classless Inter-Domain Routing |
| SC | Standard Connector/Subscriber Connector |
| TX/RX | Transmit and Receive |
| OSI | Open Systems Interconnection |
| FHRP | First Hop Redundancy Protocol |
| ISP | Internet Service Provider |
| CLI | Command-Line Interface |
| DLP | Data Loss Prevention |
| GSM | Global System for Mobile Communications |
| NAC | Network Access Control |
| BGP | Border Gateway Protocol |
| DSU | Data Service Unit |
| SDWAN | Software-Defined WAN |
| OID | Object Identifier |
| SRV | Service Record |
| DSL | Digital Subscriber Line |
| IMAP | Internet Message Access Protocol |
| MPLS | Multiprotocol Label Switching |
| SSH | Secure Shell |
| vNIC | virtual Network Interface Card |
| DoS | Denial-of-Service |
| RTSP | Real Time Streaming Protocol |
| SSD | Solid-State Drive |
| IGMP | Internet Group Management Protocol |
| URL | Uniform Resource Locator |
| USB | Universal Serial Bus |
| CAN | Campus Area Network |
| LC | Local Connector |
| NGFW | Next-Generation Firewall |
| TIA/EIA | Telecommunications Industry Association/Electronic Industries Alliance |
| RPO | Recovery Point Objective |
| SaaS | Software as a Service |
| LACP | Link Aggregation Control Protocol |
| DaaS | Desktop as a Service |
| NFV | Network Function Virtualization |
| UPS | Uninterruptible Power Supply |
| MDIX | Medium Dependent Interface Crossover |
| PAT | Port Address Translation |
| TFTP | Trivial File Transfer Protocol |
| VLAN | Virtual Local Area Network |
| dB | Decibel |
| EIRP | Effective Isotropic Radiated Power |
| GBIC | Gigabit Interface Converter |
| IoT | Internet of Things |
| MTU | Maximum Transmission Unit |
| MIB | Management Information Base |
| ARP | Address Resolution Protocol |
| MT-RJ | Mechanical Transfer - Registered Jack |
| SFP | Small Form-factor Pluggable |
| VRRP | Virtual Router Redundancy Protocol |
| DWDM | Dense Wavelength Division Multiplexing |
| IDF | Intermediate Distribution Frame |
| LTE | Long-Term Evolution |
| SOA | Start of Authority |
| IPv4 | Internet Protocol version 4 |
| LAN | Local Area Network |
| SMB | Server Message Block |
| CPU | Central Processing Unit |
| SLAAC | Stateless Address Auto-Configuration |
| CRC | Cyclic Redundancy Check |
| WPA | WiFi Protected Access |
| HDMI | High-Definition Multimedia Interface |
| ACL | Access Control List |
| MTTR | Mean Time to Repair |
| PSK | Pre-Shared Key |
| AP | Access Point |
| RTO | Recovery Time Objective |
| RG | Radio Guide |
| TACACS+ | Terminal Access Controller Access Control System Plus |
| MAN | Metropolitan Area Network |
| NAT | Network Address Translation |
| SQL | Structured Query Language |
| GRE | Generic Routing Encapsulation |
| MU-MIMO | Multiuser - Multiple Input, Multiple Output |
| NDA | Non-Disclosure Agreement |
| RADIUS | Remote Authentication Dial-In User Service |
| VoIP | Voice over Internet Protocol |
| CSMA/CD | Carrier-Sense Multiple Access with Collision Detection |
| MIMO | Multiple Input, Multiple Output |
| RDP | Remote Desktop Protocol |
| SSID | Service Set Identifier |
| PTR | Pointer Record |
| BNC | British Naval Connector/Bayonet Neill-Concelman |
| FTP | File Transfer Protocol |
| PAN | Personal Area Network |
| OTDR | Optical Time Domain Reflectometer |
| TCP | Transmission Control Protocol |
| SAN | Storage Area Network |
| SNMP | Simple Network Management Protocol |
| UDP | User Datagram Protocol |
| CIA | Confidentiality, Integrity, and Availability |
| OSPF | Open Shortest Path First |
| TTL | Time to Live |
| PoE | Power over Ethernet |
| AES | Advanced Encryption Standard |
| CSU | Channel Service Unit |
| SSO | Single Sign-On |
| CDMA | Code Division Multiple Access |
| CSMA/CA | Carrier-Sense Multiple Access with Collision Avoidance |
| LDAP | Lightweight Directory Access Protocol |
| LDAPS | Lightweight Directory Access Protocol (over SSL) |
| UPC | Ultra-Physical Contact |
| EIGRP | Enhanced Interior Gateway Routing Protocol |
| iSCSI | Internet Small Computer Systems Interface |
| RIP | Routing Internet Protocol |
| WLAN | Wireless Local Area Network |
| MOU | Memorandum of Understanding |
| CAM | Content Addressable Memory (table) |
| IP | Internet Protocol |
| IPS | Intrusion Prevention System |
| DNS | Domain Name System |
| RAID | Redundant Array of Inexpensive (or Independent) Disks |
| FCoE | Fibre Channel over Ethernet |
| PDU | Power Distribution Unit |
| RJ | Registered Jack |
| mGRE | Multipoint Generic Routing Encapsulation |
| WAN | Wide Area Network |
| BYOD | Bring Your Own Device |
| HTTPS | Hypertext Transfer Protocol Secure |
| VPN | Virtual Private Network |
| HVAC | Heating, Ventilation, and Air Conditioning |
| NAS | Network Attached Storage |
| PaaS | Platform as a Service |
| NTP | Network Time Protocol |
| HA | High Availability |
| MTBF | Mean Time Between Failure |
| UTP | Unshielded Twister Pair |
| ESP | Encapsulating Security Payload |
| IaaS | Infrastructure as a Service |
| SSL | Secure Sockets Layer |
| VNC | Virtual Network Computing |
| APIPA | Automatic Private Internet Protocol Addressing |
| SOHO | Small Office Home Office |
| RFC | Request for Comment |
| CWDM | Coarse Wavelength Division Multiplexing |
| DDoS | Distributed Denial-of-Service |
| STP | Spanning Tree Protocol |
| DHCP | Dynamic Host Configuration Protocol |
| LED | Light-Emitting Diode |
| WAP | Wireless Access Point |
| WDM | Wavelength Division Multiplexing |
| AAAA | Authentication, Authorization, Accounting, Auditing |
| AUP | Acceptable Use Policy |
| EIA | Electronic Industries Association |
| IPSec | Internet Protocol Security |
| IDS | Intrusion Detection System |
| EUI | Extended Unique Identifier |
| MDF | Main Distribution Frame |
| MAC | Media Access Control/Medium Access Control |
| SLA | Service Level Agreement |