Understanding data communications.
Held, Gilbert,
Understanding data communications. - 4th ed. / rev. by Gilbert Held. - Indianapolis, Ind. : Sams Pub., c1994. - xvii, 435 p. : ill. ;
Previous eds. written by George E. Friend ... et al.
0672305011 (pbk.) :
Data transmission systems.
Computer networks.
TK5105 / .H429 1994
Understanding data communications. - 4th ed. / rev. by Gilbert Held. - Indianapolis, Ind. : Sams Pub., c1994. - xvii, 435 p. : ill. ;
Previous eds. written by George E. Friend ... et al.
0672305011 (pbk.) :
Data transmission systems.
Computer networks.
TK5105 / .H429 1994