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Exam 200-301 topic 1 question 259 discussion

Actual exam question from Cisco's 200-301
Question #: 259
Topic #: 1
[All 200-301 Questions]

Why does a switch flood a frame to all ports?

  • A. The frame has zero destination MAC addresses.
  • B. The destination MAC address of the frame is unknown.
  • C. The source MAC address of the frame is unknown
  • D. The source and destination MAC addresses of the frame are the same.
Show Suggested Answer Hide Answer
Suggested Answer: B 🗳️

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Chosen Answer:
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Fuaad
Highly Voted 3 years, 3 months ago
B is the correct answer please update it
upvoted 38 times
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zipperump_a_zoo
Most Recent 9 months ago
Selected Answer: B
Poorly worded question. What types of traffic will a switch flood out all ports? Broadcast and multicast frames, as well as unicast frames to unknown destinations, are normally flooded to all ports in a basic switch, and all of this traffic will circulate in such a loop. Flooding means that the switch sends the incoming frame to all occupied and active ports (except for the one from which it was received). In essence, flooding is when a switch pretends to be a hub. since there is no option to select a broadcast or multicast it can only be assumes that Cisco is referring to option b as no other option can create a "flooding"
upvoted 1 times
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[Removed]
1 year, 2 months ago
Selected Answer: B
The answer is obvious. No explanation needed. gg good day Go Dodgers
upvoted 2 times
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Da_Costa
1 year, 4 months ago
Selected Answer: B
The destination is unknown
upvoted 2 times
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mfaria
1 year, 4 months ago
Selected Answer: B
Switch flooding is done to fill the CAM table and find out if the destination MAC is available. It is sent to all ports except the source one.
upvoted 1 times
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[Removed]
1 year, 4 months ago
Selected Answer: B
Flooding vs Broadcast - Cisco Community Post by Kristian Alexander Brown "... Flooding is sometimes known as an unknown unicast. This happens when a switch receives a frame with a destination mac address it does not have in the CAM table. It will flood it out all ports except the receiving port of the frame. ..."
upvoted 4 times
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[Removed]
1 year, 6 months ago
Selected Answer: B
B is correct
upvoted 1 times
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HSong
1 year, 7 months ago
D is the answer, if the destination MAC is unknown, the frame will be sent to all the port except the original one, but not ALL THE PORTS.
upvoted 2 times
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jaypzz
2 years ago
Selected Answer: B
B is correct
upvoted 1 times
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R_AZZ23
2 years, 4 months ago
B is the correct answer .
upvoted 2 times
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ZUMY
2 years, 5 months ago
Selected Answer: B
B is correct
upvoted 2 times
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Shirona
2 years, 5 months ago
B is Correct.
upvoted 1 times
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sakisg
2 years, 6 months ago
Selected Answer: B
b is correct
upvoted 1 times
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Djow
2 years, 6 months ago
Selected Answer: D
D is the correct answer. if the source MAC is know, the sw will send trafic to all ports, except the source port...
upvoted 2 times
jojolabubu
3 days, 22 hours ago
The frame includes the MAC of the source so if unknown the table is updated. Poorly worded, even incorrect somehow but answer must be B.
upvoted 1 times
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Weezyfbaby
2 years, 6 months ago
Selected Answer: B
Because CCNA
upvoted 3 times
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abual3ees
2 years, 7 months ago
Selected Answer: B
b correct
upvoted 1 times
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Sajowww
2 years, 7 months ago
Selected Answer: B
Source MAC is known, only destination MAC is unknown
upvoted 1 times
battery1979
2 years, 5 months ago
Question asked what happens if both source and destination are unknown, but no clue how a switch ends up with a frame with an unknown source.
upvoted 1 times
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Community vote distribution
A (35%)
C (25%)
B (20%)
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