Answer / shahin

a. Default AD value of directly connected interface is 0 (Zero).

b. AD value of BGP is

Internal BGP (IBGP) - 200
External BGP (EBGP) - 20

c. Access-list is a set of rules which allow/deny flow of
traffic moving through the routers.
or else we can say, ACL is method of making a router as a
packet filtering firewall.

- It is layer 3 security which control flow of traffic.
- It doesn't filter the traffic originated by router itself.
- Generally ACL is implemented in distribution layer router.
- It is created on gobal configuration mode.

In terms of identification, ACL are of two types -

a. Name ACL.
b. Number ACL.

In terms of traffic filtering, ACL are of two types -

a. Standard ACL.
b. Extended ACL.


d. The process of building a logical topology over a
physical network for the purpose of performance, security &
efficient use of bandwidth.


Rest of question, i'll answer next time....!!!

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