00623pamaa2200193 4500 0000035784 20060627090000.0 007246352x 621.3821 LEO 2004 TK5101 LEO 2004 LEON-GARCIA Communication networks : fundamental concepts and key architectures Alberto Leon-Garcia and Indra Widjaja. 2nd ed. Boston: McGraw Hill, 2004. xxvii, 900p.: col.ill.; 24cm. Includes bibliographical references and index Telecommunication systems Computer networks Indra Widjaja