Introducion

Configure Router Serial Interfaces, DTE (Data Terminal Equipment) and DCE (Data Communications Equipment)

When connecting a serial cable to the serial interface of the router, clocking is provided by an external device, such as a CSU/DSU device. A CSU/DSU (Channel Service Unit/Data Service Unit) is a digital-interface device used to connect a router to a digital circuit. The router is the DTE (Data Terminal Equipment) and the external… Continue reading Configure Router Serial Interfaces, DTE (Data Terminal Equipment) and DCE (Data Communications Equipment)

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Introducion

Null Interface in a Cisco Router

Null interfaces are virtual interfaces and are always up. A virtual interface is not a physical interface like Fast Ethernet interface or Gigabit Ethernet interface. Null interfaces never forward or receive traffic; packets routed to a null interface are dropped. Null interface is a logical interface absorbs packets without forwarding them to another interface or… Continue reading Null Interface in a Cisco Router

Introducion

loopback interface in a Cisco Router

A loopback interface is a logical, virtual interface in a Cisco Router. A loopback interface is not a physical interface like Fast Ethernet interface or Gigabit Ethernet interface. A loopback interface has many uses. Loopback interface’s IP Address determines a router’s OSPF Router ID. A loopback interface is always up and allows Border Gateway Protocol… Continue reading loopback interface in a Cisco Router

Lessons

Trivial File Transfer Protocol (TFTP)

Trivial File Transfer Protocol (TFTP) is a file transfer protocol, which is the basic form of File Transfer Protocol (FTP). Trivial File Transfer Protocol (TFTP) has a very simple design and it requires only a very small amount of memory. Trivial File Transfer Protocol (TFTP) is mainly used for network booting of computers and network… Continue reading Trivial File Transfer Protocol (TFTP)

TCP/IP & OSI

TCP/IP And OSI Model

         TCP/IP and the OSI Model Overview                       In the previous chapter we were introduced to computer networks and we got to know their importance in everyday lives. In this chapter, we will look at the layered models that are used in communication… Continue reading TCP/IP And OSI Model

Different Types Of Router Memory, Introducion

Different Types Of Router Memory

Different Types Of  Router Memory   ROM                ROM is read-only memory available on a router's processor board. The initial bootstrap software that runs on a Cisco router is usually stored in ROM. ROM also maintains instructions for   Power-on Self Test (POST) diagnostics. For ROM Software upgrades, the plugable chips… Continue reading Different Types Of Router Memory