GUPTA,PRAKASH C creator text NEW DELHI PHI 2014 2ND monographic 848 COMPUTERS ENGINEERING DATA COMMUNICATION CONCEPTS AND TERMINOLOGY, TRANSMISSION MEDIA, TELEPHONE NETWORK,DATA LINE DEVICES, ERROR CONTROL,NETWORK ARCHITECTURE, THE PHYSICAL LAYER,THE DATA LINK LAYER,DATA LINK PROTOCOLS, LOCAL AREA NETWORKS,IEEE 802.3 ETHER NETS,TOKEN PASSING LAN, WAN,BRIDGES AND LAYER-2 SWITCHES,NETWORK LAYER,VIRTUAL CIRCUIT PACKET SWITCHING NETWORK, IP,ROUTING PROTOCOLS,ROUTING PROTOCOLS 004.6 GUP 9788120348646