H12-221 Online Practice Questions and Answers

Which statements regarding BGP well-known mandatory attributes are true? (Select 3 answers)

A. Well-known mandatory attributes must be recognized by all BGP routers.

B. Well-known mandatory attributes impacts the path decision process.

C. Well-known mandatory attributes are optional in an Update packet, and can be included in an Update packet as needed.

D. Well-known mandatory attributes must be included in all Update packets.

Which of the following route entries matches ACL 2001 that is defined below? 1.0.0.0/8,1.2.0.0/16,1.2.3.0/24,1.2.4.0/24,1.2.5.0/24, 1.2.6.0/24,1.2.7.0/24,1.2.8.0/24 ACL 2001 Basic ACL 2001,1 rule Ad's step is 5 rule 0 permit source 1.2.0.0 0.0.254.255

A. 1.2.3.0/24,1.2.4.0/24, 1.2.5.0/24, 1.2.6.0/24,1.2.7.0/24,1.2.8.0/24

B. 1.0.0.0/8 ,1.2.0.0/16,1.2.3.0/24,1.2.4.0/24,1.2.5.0/24, 1.2.6.0/24,1.2.7.0/24,1.2.8.0/24

C. 1.2.3.0/24,1.2.5.0/24,1.2.7.0/24

D. 1.2.0.0/16,1.2.4.0/24,1.2.6.0/24,1.2.8.0/24

Default routes between routers are a low-cost solution because they are easy to configure and requires less system resources when compared with maintaining a complete routing table.

A. TRUE

B. FALSE

An OSPF neighbor relationship fails to establish and the OSPF error information is displayed as follows. Which of the following is most likely the cause?

A. Router IDs conflict.

B. Area IDs are mismatched.

C. Network masks are inconsistent.

D. Authentication types are inconsistent.

Which of the following BGP attributes are well known mandatory attributes? (Select 3 answers)

A. ORIGIN

B. AS_PATH

C. NEXT_HOP

D. MED

E. LOCAL_PREF

F. COMMUNITY

Which of the following BGP attributes can prevent routing loops? (Select 3 answers)

A. Originator_ID

B. Aggregator

C. Cluster_List

D. AS-Path

Which of the following statements are correct regarding how OSPF detects old or duplicate LSAs? (Select 3 answers)

A. The lower the sequence number, the more recent the LSA.

B. The smaller the LS age, the more recent the LSA.

C. A router uses 0x80000001 as the sequence number when it generates the first LSA.

D. An LSA can be flushed from the routing domain by setting its LS age to equal the Maxage.

Which of the following statements regarding ACL type are true? (Select 3 answers)

A. ACL consists of basic ACL, advanced ACL and interface-based ACL

B. ACL ranging from 2000 to 2999 belongs to advanced ACL

C. ACL ranging from 3000 to 3999 belongs to advanced ACL

D. Advanced ACL can be used to match either destination address or source address

Which parameters are carried in a BGPOpen message? (Select 3 answers)

A. Local AS number

B. BGPID

C. Keepalive timer

D. Holder timer

E. Current peer status

In VRP, by default, a BGP router automatically retransmits an update packet to its peers after the outbound routing policy for the BGP peers changes.

A. TRUE

B. FALSE