Shelly,gary b / cashman, thomas j /pratt,philip j
Business data communications : introductory concepts and techniques - 2nd ed. - Prentice hall
0133484831
Data trasmission systems 2. Computer networks
004.6 SHE
Business data communications : introductory concepts and techniques - 2nd ed. - Prentice hall
0133484831
Data trasmission systems 2. Computer networks
004.6 SHE