HUAWEI H12-221 Free Practice Questions

NEW QUESTION 1
What are the functions of route filtering? (Select 3 answers)

• A. Avoids sub-optimal routes generated during route import,
• B. Avoids routing loops.
• C. Affects route selection by changing route attributes.
• D. Implements accurate route importing and controls route advertisement.

Answer: ABD

NEW QUESTION 2
How does an IGMP router maintain group memberships on a network? (Select 2 answers)

• A. The router maintains a timer for each group membership which it refreshes for hosts that send report messages and deletes the group membership of hosts that do not.
• B. The router periodically sends Query message
• C. After a receiver host receives the Query message, the receiver host sends a Report message.
• D. A receiver host periodically sends a Report message.
• E. The router deletes a group membership only when it receives a Leave message for this group.

Answer: AB

NEW QUESTION 3
Which of the following statements are true if a BGP peer is configured with "multiple" route selection tools for route filtering? (Select 2 answers)

• A. The routes received from the BGP peer are first matched with IP-prefix and then with route-policy.
• B. The routes received from the BGP peer are first matched with route-policy and then with IP-prefix.
• C. The routes sent to the BGP peer are first matched with IP-prefix and then with route-policy.
• D. The routes sent to the BGP peer are first matched with route-policy and then with IP-prefix.

Answer: AC

NEW QUESTION 4
Which of the following route selection tools is used in multiple routing protocols, can be configured with match conditions, and consists of if-match and apply clauses?

• A. AS-path-filter
• B. IP-prefix
• C. Route-policy
• D. Community-filter

Answer: C

NEW QUESTION 5
Which of the following statements is false?

• A. An ABR maintains a separate LSDB for each area it is attached t
• B. ABRs have multiple LSBDs.
• C. Metric, an ASE LSA parameter, can be specified when an external route is imported with 1 as its default value.
• D. The externally-derived routing information carries a tag for transmitting additional information of the route which is commonly used in a routing polic
• E. The default value of the Tag label is 0.
• F. The Link State ID is the Router ID of the ASBR for type 4 LSAs.

Answer: C

NEW QUESTION 6
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.

Answer: BCD

NEW QUESTION 7
Which of the following multicast protocols can generate multicast distribution trees?

• A. MBGP
• B. MSDP
• C. IGMP
• D. PIM

Answer: D

NEW QUESTION 8
Which of the following network link type is not the basic network link type defined in OSPF?

• A. P2P
• B. P2MP
• C. Broadcast
• D. Virtual link

Answer: D

NEW QUESTION 9
Which of the following IP addresses are network addresses? (Select 2 answers)

• A. 64.104.3.7/28
• B. 192.168.12.64/26
• C. 192.135.12.191/26
• D. 198.18.12.16/28

Answer: BD

NEW QUESTION 10
Which of the following statements regarding the features of VLSM are true? (Select 2 answers)

• A. VLSM supports both IPv4 and IPv6.
• B. VLSM supports overlapping address ranges.
• C. VLSM allows for summarization of routes
• D. VLSM can divide a subnet into smaller subnets.

Answer: CD

NEW QUESTION 11
Which of the following statements about a neighbor state machine is true?

• A. The Attempt state appears only on an NBMA network or a broadcast network.
• B. The Attempt state appears only on an NBMA network or a P2MP network.
• C. LSR packets can be sent in the Exchange state.
• D. The Full state indicates that LSDB synchronization is complet
• E. No LSDB information will be exchanged.

Answer: C

NEW QUESTION 12
A company has four departments. Department A has SO PCs, Departments B and C both have 20 PCs, and Department D has 30 PCs. Assuming the IP address 192.168.1.0/x is used, which of the following statements are true if the VLSM technology is employed for subnetting? (Select 2 answers)

• A. Plan subnet 192.168.1.0/25 for Department
• B. The range of host addresses is 1 to 126.
• C. Plan subnet 192.168.1.128/27 for Department
• D. The range of host addresses is 129 to 159.
• E. Plan subnet 192.168.1.160/27 for Department
• F. The range of host addresses is 161 to 190.
• G. Plan subnet 192.168.1.192/27 for Department
• H. The range of host addresses is 192 to 222.

Answer: AC

NEW QUESTION 13
Which of the statements describes how BGP updates routes?

• A. Broadcasts all routes periodically
• B. Update all routes periodically using multicast addresses
• C. Updates only changed and new routes
• D. Updates routes on BGP peer requests

Answer: C

NEW QUESTION 14
Which of the following statements are correct regarding OSPF Network LSAs? (Select 2 answers)

• A. Network LSAs are generated by ABR.
• B. Only the router which is connected to NBMA or Broadcast Network may generate Network LSAs.
• C. DR uses Network LSAs to describe routers that have established adjacency with it in the network,
• D. Network LSAs are flooded in the entire AS.

Answer: BC

NEW QUESTION 15
The Internet Group Management Protocol (IGMP) runs between hosts and their immediately neighboring multicast routers.

• A. TRUE
• B. FALSE

Answer: A

NEW QUESTION 16
Based on BGP route selection rules, the route with the lowest local preference is preferred.

• A. TRUE
• B. FALSE

Answer: B

NEW QUESTION 17
Which of the following IP addresses can be used on a public network? (Select 2 answers)

• A. 172.30.0.1/16
• B. 127.254.11.15/16
• C. 172.15.12.7/16
• D. 193.168.10.4/16

Answer: CD

NEW QUESTION 18
In the process of calculating SPF tree, the cost from a given node to its root node is equal to the metric listed in the Router LSA generated by the node.

• A. TRUE
• B. FALSE

Answer: B

NEW QUESTION 19
The router ID which is configured in the system view takes precedence over the router ID configured in the BGP view.

• A. TRUE
• B. FALSE

Answer: B

NEW QUESTION 20
An Autonomous System (AS) is a set of routers under the control of one technical administration that presents a common routing policy.

• A. TRUE
• B. FALSE

Answer: A

NEW QUESTION 21
If the default-route-advertise command is used to advertise a default BGP route to peers, how will this operation affect the local BGP routing table?

• A. An inactive default route will be generated in the local BGP routing table which will not be delivered to the IP routing table.
• B. An active default route will be generated in the local BGP routing table which will be delivered to the IP routing table.
• C. The local BGP routing table will not be affected and no default route will be generated.
• D. A default route will be generated in the local BGP routing tabl
• E. Whether this route is delivered to the IP routing table depends on route selection results.

Answer: C

NEW QUESTION 22
Which of the following is not supported by policy-based routing for specifying the data forwarding path?

• A. Source address
• B. Port number
• C. Destination address
• D. Packet length

Answer: B

NEW QUESTION 23
When running in non-broadcast networks, OSPF uses one of the two modes: NBMA or P2MP.

• A. TRUE
• B. FALSE

Answer: A

NEW QUESTION 24
If the subnet mask for Class A address is 255.255.240.0, how many bits are used for subnetting?

• A. 4
• B. 5
• C. 9
• D. 12

Answer: D

NEW QUESTION 25
Which BGP attribute is usually used to determine the path along which data flows to an AS?

• A. Router ID
• B. Nexthop
• C. Local-Preference
• D. MED

Answer: D

NEW QUESTION 26
Which of the following situations will occur when the command"multicast bad balance" is configured?(Select 3 answers)

• A. If there exists no unicast equal-cost routes, multicast load balancing fails.
• B. If group address-based load splitting is employed, balanced distribution of entries over equal-cost routes cannot be ensured due to hash function limitations.
• C. Balanced distribution of entries over equal-cost routes can be ensured as long as multicast load balancing is performed.
• D. During multicast load splitting, traffic may not be balanced among equal-cost routesbecause multicast load balancing is based on multicast entries not multicast data packets.

Answer: ABD

NEW QUESTION 27
Which of these statements is true when configuring MD5 authentication between BGP peers?

• A. All routers in the same AS must use the same MD5 password.
• B. A pair of BGP peers must use the same MD5 password.
• C. All BGP peers must use the same MD5 password.
• D. Every BGP peer of a router must use a unique MD5 password.

Answer: B

NEW QUESTION 28
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