640-875 무료 덤프문제 온라인 액세스

Refer to the exhibit. Users in VLAN 10 report that their computers have 169.254.0.0/16 IP addresses. On the DHCP server, you discover that the 192.168.10.0/24 IP address pool and the 192.168.20.0/24 IP address pool are configured. What can you do to ensure that the users receive valid IP addresses from the DHCP server?

• A.Globally configure ip dhcp-server 192.168.20.10. On FastEthernet0/0 and FastEthernet0/1, configure ip dhcp-relay enable
• B.Globally configure ip dhcp-server 192.168.20.10. On FastEthernet0/0, configure ip dhcp-relay enable
• C.On Fast-Ethernet0/0, configure ip dhcp-relay 192.168.20.10.
• D.On FastEthernet0/0, configure ip helper-address 192.168.20.10

Which Layer 2 WAN protocol uses DLCI as the virtual circuit identifier?

• A.Metro Ethernet
• B.Frame Relay
• C.Packet over SONET
• D.PPP
• E.ATM

Which two statements are correct regarding routing protocol authentication? (Choose two.)

• A.MD5 passwords are never sent to a peer.
• B.Routers authenticate each routing update packet received.
• C.UDP port 179 is used for BGP session authentication.
• D.MD5 authentication can only be established between Internal BGP peers.
• E.BGP peers can be configured with different passwords.
• F.Authentication can be established using keychains on one peer and MD5 hashing on the other.

Which three statements about Cisco IOS XR CLI operations are true? (Choose three.)

• A.Cisco IOS XR uses a three-stage configuration method.
• B.The clear global configuration command erases the entire current running configuration.
• C.Committed changes are persistent across reboots in Cisco IOS XR.
• D.The save global configuration command saves the contents of target configuration to the running configuration.
• E.There is no concept of a startup-config in Cisco IOS XR.
• F.The commit replace global configuration command replaces the contents of the running configuration with the target configuration.
• G.The show running-config global configuration command displays the configuration that occurs if the contents of the uncommitted changed (target configuration) are committed to the running configuration.

You are deploying three switches for a network that contains 20 VLANs, as follows:
Switch A is the root for VLAN1
Switch B is the root for VLAN20
Switch C is the secondary root for VLAN 1 and VLAN 20 only
What are two ways to configure the switches? (Choose two.)

• A.Switch Aspanning-tree vlan 1 priority 4096
  Switch B
  spanning-tree vlan 20 priority 4096
  Switch C
  spanning-tree vlan 1 priority 12288
  spanning-tree vlan 20 priority 12288
• B.Switch A
  spanning-tree vlan 1 root primary
  Switch B
  spanning-tree vlan 20 root primary
  Switch C
  spanning-tree vlan 1-20 root secondary
• C.Switch A
  Spanning-tree vlan 1 root primary
  Switch B
  Spanning-tree vlan 20 root primary
  Switch C
  Spanning-tree vlan 1,20 root secondary
• D.Switch A
  spanning-tree vlan 1 priority 8192
  Switch B
  spanning-tree vlan 20 priority 8192
  Switch C
  spanning-tree vlan 1 priority 4096
  spanning-tree vlan 20 priority 4096
• E.Switch A
  Spanning-tree vlan 1 root primary
  Switch B
  Spanning-tree vlan 20 root primary
  Switch C
  Spanning-tree vlan 1-20 priority 4096