1. Which four solutions are used to prevent routing loop?(chose four)

a. split horizon : omits from the message any information about destinations routed on that link

b. route poison : Sets the distance to infinity if the destination is routed on that link

c. area hierarchies

d. holddown timer : tells to hold any changes that might affect router for some period of time

If at any time before the hold-down timer expires an update is received from a different neighboring

router with a poorer metric, the update is ignored

e. Triggered updates : new routing table that is sent immediately, in response to some change.

f. SPF algorithms

g. link-state algorithms

이런식으로 나온답니다. 답은 뭘까요..??

다 아시죠..? 얼마전에 제 칼럼에 있었으니까.^^

답은a,b,d,e 입니다.

2. You enter following command, which are correct?(chose 3)

ip route 172.15.0.0 255.255.0.0 172.137.14.78 120

a. your originating network is 172.15.0.0 ( can't know )

b. your destination network is 172.15.0.0

c. your next hop address is 172.137.14.78

d. you are using the default class C subnet mask (class B)

e. your destination address is 172.137.14.178 ( address -> network )

f. you are using the autonomous system of 120 (can't know)

g. you are using the administrative distance of 120

가 있습니다. 답은 뭘까요..??b,c,g 입니다.

궁금하심 질문주세요..^^