TY  - BOOK
AU  - Walker, Matthew. 
TI  - CCENT Cisco Certified Entry Networking Technician study guide (exam 640-822) 
SN  - 9780071591140 (pbk. : alk. paper) 0071591141 (pbk. : alk. paper)
AV  - QA76.3 .L347 2008
CY  - New York 
PB  - McGraw-Hill, c
ER  -