The IS-IS overload bit is set on R3. Which of the following statements are true? (Choose three.)

Before the timeout of the overload timer on R3, R1 and R2 do not add the LSPs generated by R3 to the SPF tree.

LSPs of R3 cannot be flooded to R1 and R2.

Routes imported to R3 through the import-route command cannot be advertised.

Before the timeout of the overload timer on R3, R1 and R2 do not add the LSPs generated by R3 to the SPF tree.

The direct route of R3 is ignored by R1 and R2 due to the setting of the overload bit.

LSPs of R3 cannot be flooded to R1 and R2.

Routes imported to R3 through the import-route command cannot be advertised.

When a router is experiencing a memory shortage, the system automatically sets the overload bit in the sent LSPs regardless of whether you have the set-overload command.

Which of the following statements regarding CHAP authentication in the PPP protocol are true? (Choose three.)

The MD5 algorithm is used to calculate a hash based on the authentication sequence ID, a random number, and the key.

Authentication requires three-way handshake. Only the user name is transmitted on the network, not the password.

The user name must be configured on the interface of the authenticated party.

If no user name is configured for the authenticated party, the password does not need to be configured on the interface of the authenticated party.

The MD5 algorithm is used to calculate a hash based on the authentication sequence ID, a random number, and the key.

Authentication requires three-way handshake. Only the user name is transmitted on the network, not the password.

The user name must be configured on the interface of the authenticated party.

Which of the following statements regarding 802.1s deployment is true?

Each VLAN owns a spanning tree instance.

Multiple bridges share a spanning tree instance.

Each VLAN owns a spanning tree instance.

Multiple VLANs share a spanning tree instance.

All VLANs share a spanning tree instance.

Based on the key configurations, as shown in the figure, R1 and R2 establish a Level-2 neighbor relationship. Which of the following statements regarding routing entries on R2 are true?

2020:: /64 will be displayed in the IP routing table.

2021:: /64 will be displayed in the IP routing table.

2019:: /64 will not be displayed in the IP routing table.

2022:: /64 will not be displayed in the IP routing table.

A network with the typology shown in the figure below is set up in a lab. On the network, SW1 uses the default configurations, and STP disables on SW2. Given this information, which of the following statements is true?

G0/0/2 of SW1 enters the Discarding state.

Go/0/2 of SW2 enters the Discarding state.

G0/0/1 of SW1 enters the Discarding state.

G0/0/1 of SW2 enters the Discarding state.

G0/0/2 of SW1 enters the Discarding state.

Huawei switches SWA and SWB are connected through seven physical Ethernet links and are configured with static link aggregation. On SWA, the interface and are configured in the following sequence: Ethernet 1/0/1, Ethernet 1/0/2, Ethernet 1/0/3, Ethernet 1/0/4, Ethernet 1/0/5, Ethernet 1/0/6,Ethernet 1/0/7. If only six ports are supported in a LAG on SWA and SWB, which of the following statements is true?

If the configurations of different ports are consistent, Ethernet 1/0/7 is the Unselected port of the LAG.

If the configurations of different ports are consistent, SWA selects one of the seven ports at random to be the Unselected port of the LAG.

If the configurations of different ports are consistent, Ethernet 1/0/6 is the Unselected port of the LAG.

If the configurations of different ports are consistent, Ethernet 1/0/7 is the Unselected port of the LAG.

If the configurations of different ports are consistent, Ethernet 1/0/1 is the Unselected port of the LAG.

On an RSTP-enabled switch, if the network topology changes, which of the following statements regarding changes to the Layer 2 forwarding entries learned by the switch is true?

All entries, apart from the entries related to edge ports and the entries related to the port that receives the TC BPDU, are deleted.

All entries, apart from the entries related to edge ports, are deleted.

If the aging time is set to 15 seconds, all the aged entries are deleted.

All entries, apart from the entries related to edge ports and the entries related to the port that receives the TC BPDU, are deleted.

Only the entries related to the port that receives the TC BPDU are deleted.

The figures below show an enterprise's Layer 2 networking architecture and information displayed when engineers check the device status after communication between departments fails. What are the possible causes of this communication failure?

The switches have different instance-VLAN mapping configurations.

The switches have different region names.

The switches have different instance-VLAN mapping configurations.

The switches have different revision levels.

The switches have different BPDU sending intervals.

The ip ip-prefix ip-prefix-name [ index index-number ] {permit | deny} ipv4 address mask-length [ greater-equal greater-equal-value ] [ less-equal- less-equal-value ] command is used to configure an IP prefix list for route filtering.If the less-equal parameter of an IP prefix list is specified in this command but the greater-equal parameter is not specified, what is the range of the created IP prefix list?

[mask-length, less-equal-value]

An OSPF router is connected to Area 0 and Area 1, and Area 1 is configured as a stub area.Which type of LSAs are in Area 1?

Type 1, Type 2, and Type 3 LSAs

Type 1, Type 2, and Type 5 LSAs

Type 1, Type 2, and Type 3 LSAs

According to the following scenario, which of the following statements are true?

R1 and R2 cannot establish a neighbor relationship.

R1 has both Level-1 and Level-2 LSDBs.

R1 has a route to the IP address 10.0.2.2/32 of loopback0 on R2.

R1 can successfully ping the IP address of loopback0 on R2.

Which of the following statements regarding OSPFv3 Router-LSAs is true?

Similar to OSPFv2, the Option field exists in an LSA header rather than the data part of a Router-LSA.

The data part of a Router-LSA contains the interface IDs of the local router and its neighbors' router ID.

When LS type in the LSA header is 0x0001, the data part of the LSAs is a Router-LSA.

Similar to OSPFv2, the Option field exists in an LSA header rather than the data part of a Router-LSA.

The data part of a Router-LSA contains the link-local address.

Which of the following statements regarding OSPFv3 is false?

Multiple instances can be run in the same OSPFv3 process on a interface.

Multiple instances can be run on a single link.

Each OSPFv3 process runs independently in a router.

The OSPFv3 packet header contains the Instance ID field.

Multiple instances can be run in the same OSPFv3 process on a interface.

Router HW1 runs BGP, and has IBGP peers and EBGP peers configured.Which of the following statements regarding the IBGP peers and EBGP peers are true?

The router sends BGP updates learned from each EBGP peer to the other EBGP and IBGP peers.

The EBGP peers must be directly connected. Otherwise, multi-hop EBGP must be configured on the router.

The router sends BGP updates learned from each IBGP peer to the other IBGP and EBGP peers.

The IBGP peers must be directly connected. Otherwise, multi-hop IBGP must be configured on the router.

The EBGP peers can establish peer relationships through loopback interfaces.

The router sends BGP updates learned from each EBGP peer to the other EBGP and IBGP peers.

The EBGP peers must be directly connected. Otherwise, multi-hop EBGP must be configured on the router.

Which of the following statements regarding IS-IS GR is true?

A new TLV is defined to support IS-IS GR.

IS-IS GR is enabled by default.

IS-IS GR uses CSNPs for event notification and neighbor relationship maintenance.

What are the possible causes for an establishment failure of an IBGP peer relationship between two routers?

There is no reachable IGP route between the routers.

Multi-hop IBGP is not configured.

There is no reachable IGP route between the routers.

The BGP protocol versions are different.

The router data is as follows. Which of the following statements is true?

Ge0/0/0 of R3 and neighbor routers are in different areas.

IS-IS IPv4 and IS-IS IPv6 are enabled on Eth0/0/1 of R3.

Ge0/0/0 of R3 and neighbor routers are in different areas.

R3 is the Level-1 DIS and Level-2 DIS for the link where Eth0/0/0 resides.

The circuit-level of Eth0/0/0/1 on R3 is Level-1-2.

Which of the following statements regarding LSDB synchronization on an IS-IS broadcast network is true?

R2 functions as the DIS and periodically sends CSNPs.

R2 functions as the DIS and sends Hello PDUs at an interval three times that of non-DIS routers.

R2 functions as the DIS and does not receive PSNPs from other routers.

R2 functions as the DIS and periodically sends CSNPs.

R1 and R3 maintain the LSDB consistency by sending PSNPs periodically.

Which of the following statements regarding IS-IS authentication are true?

Two routers can establish a neighbor relationship when they are configured with area authentication and interface authentication, respectively, and are configured with the same authentication password.

After area authentication is configured on a router, IIH PDUs, SNPs, and LSPs sent by the router must carry an authentication TLV.

Interface authentication can authenticate Level-1 and Level-2 Hello PDUs.

After interface authentication is configured on a router, IIH PDUs sent by the router must carry an authentication TLV.

Two routers can establish a neighbor relationship when they are configured with area authentication and interface authentication, respectively, and are configured with the same authentication password.

A BGP connection goes down after being successfully set up.What is not possible cause for this problem?

Mandatory attributes in Update packets are missing.

Negotiation of parameters in Open packets fails.

Mandatory attributes in Update packets are missing.

Error BGP packets are received.

After the BGP connection is set up, no Keepalive packet is received within the negotiated holdtime.

Both IS-IS CSNPs and OSPF DD packets describe the brief information about link state databases in MA network.Which of the following statements regarding the two types of packets is true?

After CSNPs and DD packets are received by the peer router, the peer router does not need to send an acknowledgment message.

After CSNPs and DD packets are received by the peer router, the peer router needs to send an acknowledgement message; otherwise, the packets need to be retransmitted.

Once the neighbor relationship is established, CSNPs and DD packets are not sent.

The master/slave relationship in OSPF DD packet exchange is not bound to DR/BDR; and CSNPs are generated only by the DIS.

After CSNPs and DD packets are received by the peer router, the peer router does not need to send an acknowledgment message.

Which of the following statements regarding MPLS is false?

When an IP packet is transmitted on an MPLS network that uses TTL processing in pipe mode, the TTL value of the IP packet decrements by 1 only at the ingress and egress nodes of the MPLS network.

MPLS supports multi-layer nesting. The value of the S bit of the innermost label is 1.

The label space range of dynamic signaling protocols such as LDP and MP-BGP from 16 to 1023.

When an IP packet is transmitted on an MPLS network that uses TTL processing in pipe mode, the TTL value of the IP packet decrements by 1 only at the ingress and egress nodes of the MPLS network.

The MPLS label is 20 bits long and is used for packet forwarding.

The output of the display in vpn-instance verbose command for displaying detailed information about all VPN instances on a network device is as follows.Which of the following statements are false?

The total number of locally configured VPN instances for which IPv6 address families are enabled is 1.

The device assigns a label to each route of the VPN instance vpna.

GigabitEthernet1/0/0 is bound to the VPN instance vpna.

The total number of locally configured VPN instances for which IPv6 address families are enabled is 1.

The VPN instance vpna does not receive VPN routes with RT being 2:1.

Which of the following statements correctly describe the LDP LSP establishment process?

An LSP is established by binding an FEC to a label and advertising the binding relationship to the upstream LSR.

When the next hop of an LSR changes due to a change in network topology and liberal mode is used, the LSR can use the previous label sent to a non-optimal next hop to quickly reestablish an LSP. Liberal mode requires more memoryand label space than conservative mode.

By default, for the same FEC, the label mapping that an LSR receives can only originate at the optimal next hop.

In DoD label advertisement mode, an LSR can distribute labels to a specified FEC without having to receive Label Request messages from its upstream device.

An LSP is established by binding an FEC to a label and advertising the binding relationship to the upstream LSR.

If multiple candidate RPs are configured in a multicast domain, which of the following parameters need to be compared when electing the RP of the group from multiple candidate RPs?

IP address of the C-RP interface

Mask length of the group range that is supported by the C-RP and needs to be matched with the group address joined by receivers

Router A has an IP route with the destination network segment of 10.0.0.1/32 and outbound interface of GigabitEthernet0/0/1. The following configuration is added: Assume that router A receives a data packet with the destination IP address of 10.0.0.1.Which of the following statements are true?

If the source IP address of the data packet is 10.0.1.1, the data packet can be forwarded and the DSCP value is set to CS3

If the source IP address of the data packet is 10.0.1.2, the data packet cannot be forwarded.

If the source IP address of the data packet is 10.0.1.2, the data packet can be forwarded and the DSCP value is set to CS3.

If the source IP address of the data packet is 10.0.1.1, the data packet can be forwarded and the DSCP value is set to CS3

If the source IP address of the data packet is 10.0.1.2, the data packet can be forwarded and the DSCP value remains unchanged.

As shown in the following figure, R1 and R2 establish an EBGP peer relationship and the BFD function is enabled. Given this information, which of the following statements is true?

The time taken to detect BFD packets on R2 is 600 ms.

The time taken to detect BFD packets on R1 is 660 ms.

The time taken to detect BFD packets on R2 is 800 ms.

The time taken to detect BFD packets on R2 is 600 ms.

The time taken to detect BFD packets on R1 is 1280 ms.

Which of the following statements regarding VXLAN packets are true?

A VNI has 24 bits and is used to identify a VXLAN segment.

The destination UDP port number is 4789.

A VNI has 24 bits and is used to identify a VXLAN segment.

The destination UDP port number is 4789.

The outer destination IP address is the IP address of the remote VTEP in a VXLAN tunnel.

The source UDP port number is 4789.

Which of the following statements regarding a TCP sliding window are false?

The sender advertises the size of the initial window.

If the sender does not receive an acknowledgment message after the retransmission timer times out, it retransmits the unacknowledged data.

The sender does not need to transmit packets with a complete window size.

The sender advertises the size of the initial window.

If the sender does not receive an acknowledgment message after the retransmission timer times out, it retransmits the unacknowledged data.

The sliding window size can only be increased or remains unchanged.

A TCP sliding window allows the sender to send multiple data packets before receiving an acknowledgment message.

The sender does not need to transmit packets with a complete window size.

Huawei H12-261 Practice Test 5 - Free Online Exam Questions 161-200

Which of the following statements regarding BGP route summarization is true? (Choose two.)

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