| Acronym | Definition |
| 3DES | Triple DES |
| ACE | Access Control Entry |
| ACL | Access Control List |
| AES | Advanced Encryption Standard |
| ACK | ACKnowledgement |
| ASCII | American Standard Code for Information Interchange |
| APIPA | Automatic Private IP Address |
| ARP | Address Resolution Protocol |
| ARPA | Advanced Research Projects Agency |
| ccTLD | country code Top Level Domain |
| CIDR | Classless InterDomain Routing |
| CHAP | Challenge-Handshake Authentication Protocol |
| CHAP v2 | Challenge-Handshake Authentication Protocol Version 2 |
| CLI | Command Line Interface |
| CN | Common Name |
| CSMA/CD | Carrier Sense Multiple Access with Collision Detection |
| DACL | Discretionary Access Control List |
| DC | Domain Controller |
| DES | Data Encryption Standard |
| DHCP | Dynamic Host Configuration Protocol |
| DN | Distinguished Name |
| DNS | Domain Name Service |
| DOD | Department Of Defense |
| DORA | DHCP mnemonic acronym |
| EAP | Extendable Authentication Protocol |
| EFS | Encrypting File System |
| ESE | Extensible Storage Engine |
| FIPS | Federal Information Processing Standard |
| FQDN | Fully Qualified Domain Name |
| FSMO | Flexible Single Master Operations |
| GC | Global Catalog |
| GPO | Group Policy Object |
| gTLD | general Top Level Domain |
| HTML | HyperText Markup Protocol |
| HOSTS | Config file mapping IPs to FQDNs |
| IANA | Internet Assigned Numbers Authority |
| IANAL | I Am Not A Lawyer |
| IAS | Internet Authentication Service (AKA RADIUS) |
| ICANN | Internet Corporation for Assigned Names and Numbers. |
| ICF | Internet Connection Firewall |
| ICMP | Internet Control Messaging Protocol |
| ICS | Internet Connection Sharing |
| ID10T | Idiot (Pronounced ID - ten - "T") |
| IEEE | Institute of Electrical and Electronics Engineers |
| IETF | Internet Engineering Task Force |
| IFAIK | As Far As I Know |
| IIS | Internet Information Service |
| IP | Internet Protocol |
| ISA | Internet Security & Acceleration Server |
| KDC | Key Distribution Center |
| KISS | Keep It Simple, Stupid |
| KRB5 | Kerberos |
| LDAP | Lightweight Directory Access Protocol |
| LLC | Logical Link Control |
| LMHOSTS | Config file mapping IPs to NetBIOS names |
| MAC | Media Access Control |
| MMC | Microsoft Management Console (AKA Mickey Mouse Console) |
| MX | Mail eXchange DNS record |
| NBT | NetBIOS over TCP/IP |
| NetBIOS | Network Basic Input Output System |
| NLB | Network Load Balancing |
| NT | Originally stood for New Technology, then was officially changed from an acronym to a noun |
| NTLM | NT Lan Man (Manager) |
| OID | Object ID |
| OSI | Open Systems Interconnection |
| OU | Organizational Unit |
| PAP | Password Authentication Protocol |
| PEAP | Protected Extensible Authentication Protocol |
| PDCE | Primary DC Emulator |
| PING | Packet Internet Groper |
| PKI | Public Key Infrastructure |
| POTS | Plain Old Telephone System |
| PTR | PoinTeR DNS resource record |
| RAID | Redundant Array of Independent (Inexpensive) Devices (Drives) |
| RAM | Random Access Memory |
| RDN | Relative Distinguished Name |
| RPC | Remote Procedure Call |
| RSA | Algorithm for public-key encryption (Rivest Shamir Adleman) |
| RTFM | Read The Fucking Manual |
| SACL | System Access Control List |
| SAP | Shiva Authentication Protocol |
| SCSI | Small Computer System Interface |
| SHA-1 | Secure Hash Algorithm |
| SID | Security ID |
| SMTP | Simple Mail Transport Protocol |
| SRV | SeRVice DNS resource record |
| SSH | Secure SHell |
| SSL | Secure Socket Layer |
| TCP | Transmission Control Protocol |
| TLS | Transport Layer Security |
| UDP | User Datagram Protocol |
| VLSM | Variable Length Subnet Mask |
| WEP | Wireless Encryption Protocol |
| WINS | Windows internet Naming Service |