Here is a Glossary (vocabulary) of terms used in router configuration and network troubleshooting. Understanding these terms will help you in performing any task related to router administration and network troubleshooting.

DNS (Domain Name System)

The Domain name System is a used to resolve human readable web addresses into machine readable IP addresses. Every time we type a domain name or web address into browser a DNS service looks in DNS table and convert the human readable domain/host name into corresponding IP address (machine readable) and process it to the correct destination.

Ethernet (MAC) Address

MAC (Media Access Control) Address is a 48-bit address assigned to a network interface controllers for communication at layer 2 (data link layer) of a network segment maintained by IEEE (the institute of Electrical and Electronic Engineers).

TCP/IP (Transmission Control Protocol/Internet protocol)

This is a suite of the communication protocol for identifying network devices and grouping (interconnecting) them into networks. TCP/IP is a protocol that can also be used in private networks such as intranet and extranet. The current running version of IP is IPv4 and the new version is IPv6 which is under development.

Router (Gateway)

A networking device used to forward data packets between computer networks. It performs a traffic directing function on the internet (check the address of the destination and forward data packets directly to the target device or another subnet). Machines in a local network are designed to know the router’s IP address.


Initially known as Alto Aloha Network, is a widely used LAN (local area network) protocol and a link layer protocol in the TCP/IP stack, set out how network devices can format data to send to other devices on the same network segment. Ethernet is currently used for 85-90 percent of the LAN-connected PCS and workstations worldwide.


A LAN based wireless networking protocol that allows devices to forward data without any physical wire connection. Technically, wifi is a type of wireless network uses the specs in the 802.11 family (802.11 b/g/n). Wireless is the most popular medium for wireless data communication within a fixed location.

LAN (Local Area Network)

LAN is a group of connected devices that share a common communication line or wireless link to a server. It is a computer network within a small geographical area like home, computer library, small office or group of building, or school.

WAN (Wide Area Network)

WAN is a wider telecommunication network that interconnects multiple LANs. A WAN may consist of connections to a company’s headquarters, its branch offices, cloud services and other facilities. WAN are often established with a privately owned or leased telecommunication circuits.

MAN (Metropolitan Area Network)

A computer network that interconnects computer resources within a geographical area larger than the area covered by LAN but smaller than the area covered by WAN.

Bandwidth Reservation

Bandwidth reservation is the process of assigning priority and controlling the flows of data on a traffic based on their criticality. The main focus of bandwidth reservation is on the best use of available bandwidth.

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