Cisco CCNA, CCNP, and Security Practice Exam: Frame Relay, NTP, Authentication, And More!

In today's Cisco practice exam, we'll take a look at Frame Relay traffic congestion indicators, Network Time Protocol, and other important exam topics. Let's get started!


CCNA And CCENT Certification:

What purposes do the BECN, FECN, and DE bits in Frame Relay serve?

Answer: When a frame arrives at a router with the FECN bit set, that means congestion was encountered in the direction in which the frame was traveling.


When a frame arrives at a router with the BECN bit set, congestion was encountered in the opposite direction in which the frame was traveling.

Frames are sometimes dropped as a result of congestion, and frames with the DE bit set will be dropped before frames without that bit set. Basically, setting the DE bit on a frame indicates data that's considered less important than data without the DE bit set.


CCNA Security / ISCW Exam:

You're configuring authentication in your Network Time Protocol deployment. What authentication options are available in NTP?


A. MD5

B. Bellman-Ford

C. clear text

D. CHAP

E. PAP

F. None

Answer: A. MD5 is the only option, as shown by IOS Help:

R1(config)#ntp authentication-key 1 ?

md5 MD5 authentication



BSCI Exam:


What device sits at the top of a multicast tree?

A. The source of the packets

B. The destination of the packets

C. A multilayer switch

D. The root bridge


Answer: A. The packet source is found at the top of our multicast tree.



BCMSN Exam:

A router or multilayer switch goes through the following stages in HSRP. Put the stages in order, from beginning to end.


A. Listen

B. Learn

C. Active

D. Disabled

E. Init

F. Speak

G. Standby

Answer: Here's the order without the letters:


Disabled, Init, Learn, Listen, Speak, Standby, Active

I'll have a new CCNP exam tutorial on this subject on the website over the weekend, with a link here in the blog!



ONT Exam:

When it comes to configuring COPP and applying it to the Control Plane, in which direction(s) can QoS be applied?

A. Both inbound and outbound

B. Inbound only

C. Outbound only

D. Neither inbound nor outbound

Answer: This can be applied on an inbound and outbound basis.

Look for more Cisco videos, practice exams, and fully-illustrated tutorials on my website!