QUESTION 21
To support the processing and calculation of IPv6 routes, IS-IS adds a new NLPID to TLV 129. The MLPID is an 8-bit field that identifies network layer protocol packets. Which of the following is the NLPID of IPv6?

A. 236
B. 232
C. 204
D. 142

Correct Answer: D
QUESTION 22
The router ID of R1 is 10.0.1.1. The LSA shown in the figure is displayed in the LSDB of R1. Which of the following statements is false about the LSA?

A. The LSA is not generated by R1.
B. OSPFV3 is enabled on at least two interfaces of the router that generates the LSA.
C. The router that generates the LSA does not generate the Network-LSA.
D. The router that generates the LSA cannot import external routes to OSPFv3.

Correct Answer: D
QUESTION 23
On the OSPFV3 network shown in the figure, area 1 is in an NSSA. R1 imports the external route 2000::1/128 to OSPFv3. Which of the following statements are true?

A. Default routes do not exist in the routing tables of R1 and R2.
B. R1 will generate an AS-External-LSA that describes 2001::1/128.
C. R2 translates the NSSA LSA that describes 2001::1/128 generated by R1 into an AS-External-LSA.
D. R1 will generate an NSSA LSA that describes 2001::1/128.

Correct Answer: AD
QUESTION 24
R1 and R2 use directly connected interfaces to establish an EBGP peer relationship. R1 imports 2000::1/128 to BGP. By default, the next hop address of the route from R2 to 2000::1/128 is                          .

Correct Answer: 2001:12::1
QUESTION 25
On the OSPFV3 network shown in the figure, the LSDB of R2 contains           Link-LSAs. (Enter only digits.)

Correct Answer: 4
QUESTION 26
On the OSPFV3 network shown in the figure, the LSDB of R2 contains             Router-LSAs. (Enter only digits.)

Correct Answer: 3
QUESTION 27
On the OSPFV3 network shown in the figure, OSPFv3 is enabled on the interfaces connecting R1, R2, and R3, and IPv6 global unicast addresses are configured for the interfaces. R1 and R3 are DRs. R1 and R3 generate Intra-Area-Prefix-LSAs.

A. TRUE
B. FALSE

Correct Answer: A
QUESTION 28
On the OSPFV3 network shown in the figure, area 1 is a common area. R2 generates an Inter-Area-Prefix-LSA to describe the routes of a network segment in the area. Such an LSA exists in both area 0 and area 1.

A. TRUE
B. FALSE

Correct Answer: B
QUESTION 29
There are multiple types of MAC address entries on a switch. Which of the following entries are manually configured and cannot be aged out?

A. Blackhole MAC address entries
B. Static MAC address entries
C. MUX MAC address entries
D. Dynamic MAC address entries

Correct Answer: AB
QUESTION 30
An interface of a switch is in error-down state. A possible cause is that the average rate of broadcast packets received by the interface exceeds the upper threshold set by the administrator for storm control.

A. TRUE
B. FALSE

Correct Answer: A
QUESTION 31
If users connected to a switch change frequently, you can configure port security to convert dynamic MAC addresses into sticky MAC addresses. In this way, when users change, the old bound MAC address entries can be in aged out in a timely manner.

A. TRUE
B. FALSE

Correct Answer: B
QUESTION 32
Both VLAN aggregation and Mux VLAN are deployed on the enterprise network shown in the figure, and all switch interfaces connected to terminals are access interfaces. Given this, match PC1 to PC4 with the hosts or servers that they can access on the network. (Note: A host cannot be matched with itself. For example, PC1 cannot match PC1.) (Tokens can be reused.)

Select and Place:

Correct Answer:

QUESTION 33
On the network shown in the figure, SW3 is the user gateway and DHCP relay agent. The administrator plans to configure DHCP snooping on SW3 to prevent DHCP attacks. Which of the following commands does not need to be configured on SW3?

A. [SW3-GigabitEthernet0/0/3] dhcp snooping trusted
B. [SW3] dhcp snooping enable ipv4
C. [SW3-GigabitEthernet0/0/1] dhcp snooping enable
D. [SW3-GigabitEthernet0/0/2] dhcp snooping enable

Correct Answer: A
QUESTION 34
When the administrator configures traffic suppression on a switch, which of the following types of packets can be suppressed based on the bit rate in the VLAN view of the switch?

A. Unknown multicast packets
B. Broadcast packets
C. Unknown unicast packets
D. Known unicast packets

Correct Answer: B
QUESTION 35
The figure shows an MPLS packet with multiple labels. Which of the following values for the S field is correct?

A. S1=1, S2=1, S3=0
B. S1=0, S2=0, S3=1
C. S1=2, S2=1, S3=0
D. S1=3, S2=2, S3=1

Correct Answer: B
QUESTION 36
On an MPLS network where LDP is used to establish LSPs, a transit node directly connected to the ingress node that sends a label request distributes labels to the ingress node only after receiving a label mapping message from the egress node. In this case, which of the following is the correct combination of the label advertisement mode and label distribution control mode?

A. DoD + ordered
B. DoD + independent
C. DU + ordered
D. DU + independent

Correct Answer: D
QUESTION 37
The figure shows the LSP information of R1 and R3 on an MPLS network. An administrator runs the ping -a 10.1.12.1 3.3.3.3 command on R1. Given this, which of the following statements is true?

A. Both the Echo Request and Echo Reply packets received by R2 do not carry any label.
B. The Echo Request packet received by R2 carries label 1025, and the Echo Reply packet received by R2 does not carry any label.
C. The Echo Request packet received by R2 carries label 1025, and the Echo Reply packet received by R2 carries label 1024.
D. The Echo Request packet received by R2 does not carry any label, and the Echo Reply packet received by R2 carries label 1024.

Correct Answer: B
QUESTION 38
As shown in the figure, R1 to R4 are four routers in AS123. They all run OSPF and implement route reachability within the AS. Network segments 10.1.1.0/24 and 10.4.4.0/24 are not advertised into OSPF. R1 and R4 establish an IBGP peer relationship based on Loopback0 and advertise network segments 10.1.1.0/24 and 10.4.4.0/24 into BGP. Which of the following methods can be used to implement communication between PC1 and PC2?

A. Deploy policy-based routing on R1 and specify R2 as the next hop for traffic from PC1 to PC2.
B. Deploy MPLS and LDP on R1 to R4 and establish LSPs for routes 1.1.1.1/32 and 4.4.4.4/32.
C. Run BGP on R2 and R3, and establish full-mesh IBGP connections in AS 123.
D. On R1 and R4, import routes 10.1.1.0/24 and 10.4.4.0/24 into OSPF.

Correct Answer: BCD
QUESTION 39
In the figure, to correctly transmit VPN routes in the hub-spoke networking, an administrator can deploy IGP between the Hub-PE and Hub-CE and EBGP between the Spoke-PE and Spoke-CE.

A. TRUE
B. FALSE

Correct Answer: B
QUESTION 40
On an MPLS network, if the value of the S field in an MPLS packet received by the egress node is             , the label is at the bottom of the stack and the egress node forwards the packet over an Ip route. (Enter only digits.)

Correct Answer: 1