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CCNP™ Route (BGP Practice Questions)

Exam Code 300-101

 

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Q1. What is the range of autonomous system numbers (ASNs) that can be assigned to a network using BGP?

A. 1 to 256

B. 1 to 1024

C.1 to 64,640

D. 1 to 65,535

  Correct Answer: D

 

Explanation:

The assignable BGP autonomous system numbers are from 1 to 65,535 (I.e. 65,535 in total). Autonomous system numbers are of 16 bit length. This 2 ^ 16 = 65536 -1 possible ASNs, since ASN of all 0s is not assigned. Out of this, the Internet Assigned Numbers Authority (IANA) has reserved the block of AS numbers 64512 through 65535 for private use (not to be advertised on the global Internet).

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