CCNA2 Chapter 4 Study Guide
I.
II.
III.
Cisco Discovery Protocol (CDP)
A. What has to be true in order to learn about devices using CDP? (4.1.1)
B. At what layer of the OSI model does CDP operate? (4.1.1)
C. What information is displayed with the show cdp neighbors command (be
able to identify in a list) (4.1.2)
D. What information is contained in TLVs? (4.1.2)
E. What are some Layer 3 (network layer) protocols that CDP can provide
information about? (4.1.1)
F. What must you do if you want to get CDP information from a device that is
not a directly-connected neighbor of the device you are logged into? (4.1.2)
G. Look at the commands listed in graphic one on frame 4.1.6.
H. What command (and at which prompt) is used to turn on cdp globally? (4.1.5
sort of)
I. What command (and at which prompt) is used to turn on cdp on a particular
interface? (4.1.5)
J. Will the interface command work if cdp is not enabled globally? (4.1.5)
K. What is the difference between the outputs from the show cdp and the show
cdp neighbors commands? (4.1.3 and LABs)
Telnet
A. What is the main use of Telnet? (4.2.1)
B. How many sessions can occur simultaneously on a Cisco router? (4.2.1)
C. Know the commands used to initiate a Telnet session. (4.2.2)
D. What is required to use a host name instead of an IP address when starting a
Telnet session? (4.2.2)
E. Which mode(s) must you be in to use Telnet? (4.2.2)
F. What commands are required on a router to enable telnet?
G. How do you suspend a Telnet session? (4.2.3)
H. How do you resume the last Telnet session that was suspended? (4.2.3)
I. What command allows you to resume any Telnet session you choose? (4.2.4)
J. What other information is required to use the command in “I” above? (4.2.4)
K. What command will get you the information required in “I” above? (4.2.4)
L. After what period of time will a Telnet session be terminated, by default, if it
is unused? (4.2.2)
M. Why is Telnet used for troubleshooting (3 reasons)? (4.2.1)
Ping and Traceroute
A. What protocol does Ping use? (4.2.5)
B. Why is Ping considered to be a very basic testing mechanism? (4.2.5)
C. What does a “!” mean when using Ping on a Cisco router? (4.2.5)
D. What does a “.” mean when using Ping on a Cisco router? (4.2.5)
E. What is the different between Ping and Traceroute? (4.2.5)
F. What does “***” mean when using Traceroute on a Cisco router? (4.2.5)