How Router Interfaces get Their Names on Cisco Routers?

Why is your router’s Ethernet interface called Ethernet0/0 on one router but Ethernet 3/0 on another router? Where do these names come from? This tutorial will explain how Cisco router interfaces get their names.

Where do Router Interfaces get Their Names?

Router interfaces get their names when the router boots. A “device discovery” takes place and the names of the interfaces are generated based on a predicable method. On fixed interface routers (like the older 2500 series routers) the interfaces will always be the same. However, on newer routers like 2600, 3600, 3700, and Cisco 2800 series routers, interfaces can be modular. That means that the interfaces are cards (modules) that can be “plugged into” the router in different slots. Some of these interfaces are on WAN interface cards (WIC) and some are on Network Modules (NM). Other router interfaces will be built right onto the router. The newer model routers have different names for some of these slots like enhanced network modules (NME) and high-speed WIC (HWIC). However, for the purposes

Four Modes to Access and Configure a Cisco Router

Cisco IOS Command Summary—Four Modes to Access and Configure a Cisco Router

The four modes for accessing and configuring a Cisco router are: user EXEC mode, privileged EXEC mode, global configuration mode, interface configuration mode

Each mode has a unique command set.

Purpose of each Mode

user EXEC mode is the initial startup mode.  A router configuration session can be initiated using terminal emulation programs such as Kermit, HyperTerminal, or telnet. 

privileged EXEC mode is the system administrator mode.  In this mode configuration files can be read, the router can be rebooted, and operating parameters can be changed.

global configuration mode is used to modify system-wide configuration parameters, such as routing tables and routing algorithms.

interface configuration mode is used to modify the Ethernet and serial port configurations.

Ten terms you should know in Operating Systems

There are 10 important terms that you must know it. When you finish read and understand the following terms you will find  7 multiple choice questions answer it and send your answers by email. let's start with the main term which is Operating system .

1. Operating system: Is a set of programs that lies between application software and the computer hardware. System software means all programs related to coordinating computer  operation, including the operating system, Programing language translators , and service program.

2. The kernel : most of which  remains  in memory,  is called  resident. The  kernel controls  the  entire operating system and loads into memory nonresident operating system programs from disk storage as needed.