Midterm study

What Are characteristics of the core layer?

What Are characteristics of the Distribution layer?

What Are characteristics of the Access layer?

Circuit vs. Packet Switched Networks

What is SONET/SDH

what is WDM/DWDM

What is important about Cisco HDLC

characteristics of PPP encapsulation

What is LCP

what is NCP

what is frame relay held together by?

what is Link Management Interface

What Frame relay congestion protocols exsist? and what do they do?

What are the positives and negatives of NAT?
(at least 3)

IPSEC vs. GRE

logging sevritys 0-7?

command to send console debugging to vty?

What is NTP? what port? what time format?

What is SNMP? which version is secure?