CCNA And CCENT Daily Practice Exam — Frames and Frame Handling

Here’s your free CCNA 200-125 and CCENT 100-105 practice exam for today.   Visit my CCNA Practice Exam Page when you’re done here, and thanks for making my work part of your success story!

(I’m also posting these questions  in video format on my YouTube channel!)

Question 1:   What type of frame or packet will always have ff-ff-ff-ff-ff-ff as the destination address?

A.    Layer 2 multicast

B.   Layer 3 multicast

C.   Layer 2 broadcast

D.   Layer 2 unknown unicast

E.   Layer 3 broadcast

F.    Layer 3 unknown unicast


Question 2:    With fragment-free processing,  what portion of a frame (if any) is checked for corruption?

A.  The entire frame.

B.  The first 64 bytes only.

C.  The last 64 bytes only.

D.  This processing method does not check for corruption.


Question  3:   Rate the three frame processing methods in terms of their level of error detection, from highest to lowest.

A.   fragment-free

B.   cut-through

C.   store-and-forward


Question 4:  What portion of the MAC address aa-bb-cc-11-22-33 is the OUI?

(No choices on this one.)


Question 5:    Host C is sending a frame to Host A.   The switch has a MAC table entry for Host A, but for no other host in the network.  What action will the switch take with this frame?

Host C Replies To Host A

A.  Forward

B.  Filter

C.  Flood

D.  Broadcast

E.  Multicast

The answers follow this brief and important message:

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Let’s get to the answers….

Answer 1:  C.   The destination MAC address of ff-ff-ff-ff-ff-ff indicates a Layer 2 broadcast.

Answer 2:  B.   Fragment-free processing checks the first 64 bytes of a frame for corruption.  If none is found, it’s assumed the rest of the frame is fine.

Answer 3:  C, A, B.  Store-and-forward  has the highest level of error detection, followed by fragment-free processing.   Cut-through switching has no error detection.

Answer 4:  aa-bb-cc is the OUI  of that MAC address.  The OUI is always the first half of a MAC address.

Answer 5:  A.  The switch knows which port leads to Host A, so there’s no reason to flood or drop the frame.  The switch will forward the frame via Fast 0/1.

See you tomorrow with a new CCNA Practice Exam!

Chris B.