CCNA

Ethernet was initially considered not suitable as a WAN access technology because of the maximum cable length supported was only...

ATM is the abbreviation of Asynchronous Transfer Mode. It is using time-division multiplexing (TDM) for data communications. It is capable...

Frame relay is a packet-switching telecommunication service designed for interconnecting enterprise LANs. Being a student of networking, it is important...

ISDN stands for Integrated Services Digital Network. It is a circuit-switched technology using the local loop of a PSTN to...

Dialup is a WAN connection technique established using a modem and Active PSTN line. The modem dials a number attached...

Leased Lines are dedicated communication channels between two or more nodes. Usually, it is a pre-established WAN connection from the...

PDH is the abbreviation of plesiochronous digital hierarchy. The term plesiochronous derives from two Greek words: ‘plesio’ means ‘near’ and...

SDH is the abbreviation of Synchronous Digital Hierarchy, which refers to multiplexing techniques and technology used in networking and telecommunications....

SONET stands for Synchronous Optical Networking. It is a protocol for transmitting a huge volume of data over long distances...