H31-124_V2.0-ENU Online Training Archives

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1. The Ethernet switch working in store and forward mode drops the frame with length smaller than 64 bytes.

True

False

2. VXLAN uses MAC in UDP encapsulation to extend Layer 2 networks and encapsulates Ethernet packets on IP packets. When packets are transmitted on a touted network, the intermediate touting device does not need to learn inner MAC addresses.

True

False

3. Which of the following statements about LAN switch is correct?

LAN switch is transparent for user, it does not modify the data field of the forwarded frame.

LAN switch can still operate normally even when loop exists.

LAN switch can detect loop according to the contents of the packet.

LAN switch can modify the data field of the forwarded frame when necessary.

4. Which of the following statements about layer 2 LAN switch are incorrect?

LAN switch will modify the data link layer header of the packet and then forward it.

LAN switch can learn Mac address automatically.

LAN switch operates at data link layer.

LAN switch will modify the network layer header of the packet and then forward it.

5. Is the following statement correct or incorrect? Because a bypass tunnel Is manually created during TE FRR configuration, the constraint shortest path first (CSPF) does not need to be enabled.

True

False

6. Which of the following statements is correct regarding virtual router?

If multiple routers are configured with the same virtual router I

they all associate to the same virtual router.

If multiple routers associate to the same virtual router, they must be configured with the same virtual router ID and at feast one virtual IP address.

If multiple routers associate to the same virtual router, they must be configured with the same virtual router ID and virtual IP address.

If multiple routers are configured with the same virtual IP address, they all associate to the same virtual router.

7. The VRRP advertfse-lnterval is 2s, preempt mode is enabled, Delay Time is 3s, then which of the following is the Master_Down_Interval time?

8. Which of the following statements are correct?

Both TE FRR and VPN FRR are used to protect tunnels, and therefore they can replace each other.

After VPN FRR is deployed, the end-to-end service convergence time is shorter than 1 second.

TE FRR Implements quick traffic switchovers if a PE becomes faulty.

VPN FRR implements quick traffic switchovers if a PE becomes faulty.

9. Which of the following statement are correct regarding TTL value in VRRP packet?

The VRRP packet is only forwarded in one IP network, so the TTL value is always set to 1.

The TTL value of device from different manufactures is different; on VRP, the TTL value is 1.

By default, the VRRP packet with TTL value not equal to 255 will be dropped; On VRP, we can use some commands to disable the function of delecting TTL value.

The TTL value must be 255 In normal VRRP packet.

10. Which of the following operations need to be complete before IP FRR configuration?

Configure different costs to generate two routes with different costs.

Configure the same cost to generate two equal-cost routes.

Configure a dynamic routing protocol on the entire network to Implement IP connectivity between nodes.

Configure static routes or an IGP to implement IP connectivity between nodes.

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11. PIM-SM relies on particular unicast routing protocol for RPF check.

True

False

12. Which of the following statements regarding multicast MAC address is correct?

The first six hexadecimal value of the multicast Mac address is 0x01005e.

Multicast MAC address is composed of 23 bits.

The range of multicast MAC address is assigned by IEE

On Ethernet, 28-bits of layer 3 multicast IP address are mapped into the 24-bits of the layer 2 multicast MAC address.

13. Which of the following multicast IP addresses is administratively scope address?

224.0.0.0-224.0.0.255

239.0.0.0- 239.255.255.255

224.0.1.0-238.255.255.255

224.0.0.0-239.255.255.255

14. The IGMP snooping configuration is as follows:

#

vlan batch 3

#

igmp-snooping enable

#

vlan 3

igmp-snooping enable

#

interface GigabitEthernet1/0/1

port hybrid tagged vlan 3

I2-multicast static-group group-address 225.1.1.1 to 225.1.1.3 vlan 3

#

interface GigabitEthernet3/0/1

port hybrid tagged vlan 3

igmp-snooplng static-router-port vlan 3

Which of the following statements are correct?

The device connected to GE 1/0/1 can receive multicast traffic only for the multicast groups 225.1.1.1 to 225.1.1.3. because static multicast groups are configured on GE 1/0/1.

The device connected to GE 1/0/1 can send Report messages to receive multicast data 'or multicast groups outside the 225.1.1.1 to 225.1-1.3 range.

IGMP snooping has been enabled on the switch.

The device connected to GE 3/0/1 Is a multicast router.

15. Which of the following statements regarding IP address 224.0.0.1 are correct?

It represents all the hosts and routers.

It represents all the routers.

It is a private IP address.

It is a multicast IP address.

16. The PPPoE Session Stage is a complete PPP procedure.

True

False

17. The Session ID of PPPoE could be changed during the whole Session Stage.

True

False

18. After the server receives the PADR sent by the client, which message will be sent as the response and to identify the connection?

PADS

PADR

PADO

PADT

19. Which of the following functions could be achieved by the LCP of PPP?

To establish, maintain and terminate the point-to-point connection

IPX address negotiation

IP address negotiation

To maintain multiple physical links

20. What are the three components of PPP?

NCP (Network Control Protocol)

PPPOE

LCP (Link Control Protocol)

The extension protocol of PPP