What is the hardest topic to study for CCNA?

[jonhylever]

What is the hardest topic to study for CCNA?

Bridging/Switching
7-layer OSI Model
Routed Protocols (IP)
Routing Protocol (RIP, IGRP etc.)
WAN Protocols (Frame Relay, ISDN, PPP, etc.)
LAN Technologies
Basic Router Management and Configuration
Access Lists

[Anna Hussie]

Routing protocol is a little difficult than others because sometimes it is very difficult to understand basic things of this.

[Skizmo]

What is the hardest topic to study for CCNA?
Depends on how good/smart you are.

[Darryl.Burke]

Copied from http://www.techexams.net/forums/ccna-ccent/341-what-hardest-topic-study-ccna.html and spammed all over the net.

db

[dawid2011ed]

I have just answered this a while ago. But anyway, since this are the hardest subjects, I can have more study habit on these topics.