H12-221 : HCNP-R&S-IERN (Huawei Certified Network Professional-Implementing Enterprise Routing Network) : Part 04
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Once a BGP connection is established, a BGP speaker advertises all the optimal routes in the BGP routing table to its peers.
- TRUE
- FALSE
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Which of the following routes match the ACL filter given below? (Select 2 answers)
“acl number 2001
rule 0 permit source 1.1.1.0 0.0.254.255″- 1.1.1.1/32
- 1.1.2.1/32
- 1.1.3.1/32
- 1.1.4.1/32
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If both the ospf cost and reference-bandwidth are configured on an interface, the value set by the ospf cost command is used as the cost of the interface.
- TRUE
- FALSE
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Which of the following statements is false?
- An ABR maintains a separate LSDB for each area it is attached to. ABRs have multiple LSBDs.
- Metric, an ASE LSA parameter, can be specified when an external route is imported with 1 as its default value.
- The externally-derived routing information carries a tag for transmitting additional information of the route which is commonly used in a routing policy. The default value of the Tag label is 0.
- The Link State ID is the Router ID of the ASBR for type 4 LSAs.
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Which of the following protocols support the multicast ASM service model? (Select 2 answers)
- PIM-SM and IGMFV2
- PIM-SSM and IGMPv3
- BGPandOSPF
- PIM-DM and IGMPv2
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When a routing protocol import routes discovered by other routing protocols, it must import only the routes that meet the conditions and set attributes for the imported routes. In such a case, a route-policy can be created.
- TRUE
- FALSE
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Which parameters are carried in a BGPOpen message? (Select 3 answers)
- Local AS number
- BGPID
- Keepalive timer
- Holder timer
- Current peer status
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Which of the following statements regarding an AS-external-LSA are true? (Select 3 answers)
- The Link State ID field specifies the network segment address of an advertised destination.
- The Advertising Router field specifies the Router ID of an ASBR.
- The Net mask field specifies the network mask of an advertised destination.
- The Link State ID together with Advertising Router fields are used to uniquely identify an AS-external-LSA.
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The Origin attribute of the BGP routes injected with the network command are considered IGP.
- TRUE
- FALSE
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Whenever changes occur in the BGP routing table, a BGP Speaker advertises all the optimal routes in the BGP routing table to its peers.
- TRUE
- FALSE
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According to BGP route selection rules, a local route that is automatically summarized takes precedence over a local route that is manually summarized.
- TRUE
- FALSE
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Assume that the following commands are run to configure BGP
timer keepalive 30 hold 90
peer 1.1.1.2 timer keepalive 10 hold 30Which statements regarding the configuration are true? (Select 2 answers)
- A global configuration is preferred. Therefore, the timer values for peer 1.1.1.2 are “keepalive 30 hold 90.”
- A peer configuration is preferred. Therefore, the timer values for peer 1.1.1.2 are “keepalive 10 hold 30.”
- The smaller value between the global and peer timer values is chosen. Therefore, the timer values for peer 1.1.1.2 are “keepalive 10 hold 30”.
- The default configuration is “timer keepalive 60 hold 180.” Therefore, peer 1.1.1.2 can detect connection faults faster than the default configuration.
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Which statements about OSPF packets are true? (Select 3 answers)
- Hello packets can be sent after OSPF is enabled on an interface.
- LS Request packets are sent only after an adjacency is established.
- LS Update packets contain detailed LSA information for LSDB synchronization.
- LS Update packets are sent only after an adjacency is established.
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Which of the following statements regarding multicast MAC addresses are true (Select 3 answers)
- The high-order 24 bits of a multicast MAC address are 0x01005e while the low-order 23 bits of a multicast MAC address are the low-order 23 bits of a multicast IP address.
- One multicast MAC address can map 32 different IP multicast addresses.
- Multicast MAC addresses are used in the link layer to identify receivers that are in the same multicast group.
- One multicast MAC address can map only one IP multicast address.
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In VRP, by default, the routes injected into the BGP are not automatically summarize:
- TRUE
- FALSE
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Which of the following statements regarding the MED attribute are true? (Select 3 answers)
- Based on BGP route selection rules, the MED has precedence over the AS_Path, Preferred-Value, Local-Preference, and Origin attributes.
- The MED of a BGP route is 100 by default.
- Generally, BGP compares only the MEDs of routes received from the same AS but if the “compare-different-as-med” command is configured, BGP can compare the MEDs of the routes received from multiple ASs.
- the default MED value 0 on a BGP indicates that the route is not specified. If the bestroute med-none-as-maximum command is configured, the maximum MED value that can be set is 4294967295.
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Route filtering can filter not only routing information but also link-state information.
- TRUE
- FALSE
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Which of the following statements regarding DR in PIM protocol are true? (Select 3 answers)
- In DR election, the router with the lowest IP address is elected among the routers of the same DR priority..
- A source’s DR sends Register messages to an RP.
- A receiver’s DR is sends Join messages to a multicast source or an RP.
- An Assert winner on a shared network segment may not be a DR.
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Which of the following are well-known communities attributes? (Select 3 answers)
- NO_EXPORT (OxFFFFFF0l)
- N0_ADVERT1SE (0xFFFFFF02)
- NO_EXPORT_SUBCONFED
- AS (2Byte): Number (2Byte)
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Which of these statements is true when configuring MD5 authentication between BGP peers?
- All routers in the same AS must use the same MD5 password.
- A pair of BGP peers must use the same MD5 password.
- All BGP peers must use the same MD5 password.
- Every BGP peer of a router must use a unique MD5 password.
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