| No. | Item | Definition |
|---|---|---|
| 1. | access point | wireless network connection device |
| 2. | ACL | rule list controlling access |
| 3. | Active Directory | Microsoft directory service platform |
| 4. | ARP | maps IP to MAC |
| 5. | authentication | verifying user or device identity |
| 6. | authorization | granting permitted access rights |
| 7. | backup | saved copy for recovery |
| 8. | bandwidth | maximum data transfer capacity |
| 9. | BGP | internet routing exchange protocol |
| 10. | broadcast | traffic sent to all |
| 11. | cabling | physical network wiring system |
| 12. | Cat6 | common Ethernet cable category |
| 13. | certificate | digital identity verification file |
| 14. | client | device using network services |
| 15. | configuration | device settings and parameters |
| 16. | console | direct device management connection |
| 17. | data center | facility housing computing equipment |
| 18. | DDoS | distributed traffic flood attack |
| 19. | default route | fallback path for traffic |
| 20. | DHCP | assigns IP settings automatically |
| 21. | DNS | translates names to addresses |
| 22. | downtime | time a service is unavailable |
| 23. | encryption | protecting data by encoding |
| 24. | Ethernet | common wired networking standard |
| 25. | failover | automatic switch after failure |
| 26. | fiber | glass cable for data |
| 27. | firewall | filters allowed and blocked traffic |
| 28. | firmware | embedded device operating software |
| 29. | FTP | file transfer protocol |
| 30. | full-duplex | simultaneous send and receive |
| 31. | gateway | path to other networks |
| 32. | half-duplex | alternating send and receive |
| 33. | high availability | designed for minimal downtime |
| 34. | hostname | device name on a network |
| 35. | HTTP | web communication protocol |
| 36. | HTTPS | secure web traffic protocol |
| 37. | hypervisor | software managing virtual machines |
| 38. | ICMP | network control and error protocol |
| 39. | IDS | detects suspicious network activity |
| 40. | IMAP | retrieves synchronized email messages |
| 41. | interface | network connection point |
| 42. | IP address | unique network device identifier |
| 43. | ISP | internet service provider |
| 44. | Kerberos | ticket-based authentication protocol |
| 45. | LAN | local area network |
| 46. | latency | delay in data transmission |
| 47. | LDAP | directory access protocol |
| 48. | least privilege | minimum necessary access rights |
| 49. | load balancer | distributes traffic across servers |
| 50. | log | record of system events |
| 51. | MAC address | hardware network interface address |
| 52. | malware | harmful software |
| 53. | MFA | multiple login verification methods |
| 54. | modem | connects network to provider |
| 55. | monitoring | watching systems for issues |
| 56. | multicast | traffic sent to many |
| 57. | NAT | translates private and public addresses |
| 58. | NFS | network file sharing protocol |
| 59. | NIC | network interface card |
| 60. | OSPF | internal link-state routing protocol |
| 61. | outage | period of service unavailability |
| 62. | packet | small unit of network data |
| 63. | patch panel | cable termination connection board |
| 64. | ping | tests reachability and delay |
| 65. | PKI | certificate trust management system |
| 66. | PoE | power delivered over Ethernet |
| 67. | POP3 | downloads email from server |
| 68. | port | numbered service communication endpoint |
| 69. | proxy | intermediary for network requests |
| 70. | RADIUS | centralized authentication and accounting |
| 71. | RDP | remote desktop access protocol |
| 72. | redundancy | extra components for resilience |
| 73. | RIP | distance-vector routing protocol |
| 74. | router | forwards traffic between networks |
| 75. | routing table | list of known network paths |
| 76. | server | provides services to clients |
| 77. | SFTP | secure file transfer protocol |
| 78. | SNMP | network monitoring management protocol |
| 79. | SSH | secure remote shell access |
| 80. | SSID | wireless network name |
| 81. | subnet mask | defines network and host portions |
| 82. | switch | connects devices within a network |
| 83. | syslog | standard system logging service |
| 84. | TACACS+ | device administration authentication protocol |
| 85. | TCP | reliable connection-based transport protocol |
| 86. | Telnet | unencrypted remote terminal protocol |
| 87. | TFTP | simple file transfer protocol |
| 88. | TLS | encrypts network communications securely |
| 89. | traceroute | shows path to destination |
| 90. | UDP | fast connectionless transport protocol |
| 91. | unicast | traffic sent to one |
| 92. | uplink | connection toward core network |
| 93. | uptime | time a service is available |
| 94. | virtualization | running virtual systems on hardware |
| 95. | VLAN | virtual local network segment |
| 96. | VPN | encrypted private network tunnel |
| 97. | vulnerability | weakness that can be exploited |
| 98. | WAN | wide area network |
| 99. | Wi-Fi | wireless local networking technology |
| 100. | zero trust | never assume access is safe |