Computer Network Technology

A cable tester is designed to verify the continuity and proper termination of network cables like CAT5e. A toner probe is for tracing cables, an OTDR is for fiber optics, and a loopback plug is for testing ports.

QoS (Quality of Service) is a set of technologies used to manage network traffic and prioritize specific types of data, such as voice, to ensure clear communication. PAT, DNS, and SIP serve different networking functions.

A bridge operates at the Data Link layer (Layer 2) of the OSI model, where it makes forwarding decisions based on MAC addresses.

Telnet is a legacy protocol that uses port 23 by default for remote terminal access.

According to the standard CompTIA troubleshooting methodology, after establishing a plan of action, the next step is to implement the solution or escalate the issue if necessary.

In the standard troubleshooting process, documenting findings, actions, and outcomes is the final step performed after verifying full functionality.

SIP (Session Initiation Protocol) is the standard signaling protocol used for initiating, maintaining, and terminating real-time sessions like VoIP calls.

The ipconfig command in Windows displays current TCP/IP network configuration values, including the default gateway (router address).

Routers operate at the Network layer (Layer 3) and are designed to route traffic between different networks, thereby separating broadcast domains. Switches typically reside within a single broadcast domain unless VLANs are configured.

The three-way handshake is a feature of TCP, which operates at the Transport layer (Layer 4) of the OSI model.