單項(xiàng)選擇題

Study the exhibit carefully.

Routers A and B are customer routers. Routers 1, 2, 3 and 4 are provider routers. The routers areoperating with various IOS versions. Which frame mode MPLS configuration statement is true?()

A.Before MPLS is enabled, the ip cef command is only requited on routers 1 and 4
B.After MPLS is enabled, the ip cef command is only required on routers 1 and 4
C.Before MPLS is enabled, the ip cef command is only required on the Ethernet 0 interfaces ofrouters 1 and 4
D.After MPLS is enabled, the ip cef command is only required on the Ethernet 0 interfaces ofrouters 1 and 4
E.Before MPLS is enabled, the ip cef command must be applied to all provider routers


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1.單項(xiàng)選擇題

A new router was configured with the following commands:

The configuration above was found on an Internet Service Provider’s (ISP) Multiprotocol LabelSwitching (MPLS) network. What is its purpose?()

A.To prevent customers from running TDP with the ISP routers
B.To prevent customers from running LDP with the ISP routers
C.To prevent other ISPs from running LDP with the ISP routers
D.To prevent man-in-the-middle attacks
E.To use CBAC to shut down Distributed Denial of Service attacks
F.To use IPS to protect against session-replay attacks
G.None of the above

2.多項(xiàng)選擇題IPSec VPN is a widely-acknowledged solution for enterprise network. Which three IPsec VPNstatements are true?()

A.IKE keepalives are unidirectional and sent every ten seconds
B.IPsec uses the Encapsulating Security Protocol (ESP) or the Authentication Header (AH)protocol for exchanging keys
C.To establish IKE SA, main mode utilizes six packets while aggressive mode utilizes only threepackets
D.IKE uses the Diffie-Hellman algorithm to generate symmetrical keys to be used by IPsec peers

5.單項(xiàng)選擇題Which statement correctly describes IPsec VPN backup technology?()

A.The cypto isakmp keepalive command is used to configure the Stateful Switchover (SSO)protocol
B.Reverse Route Injection (RRI) is configured on at the remote site to inject the central sitenetworks
C.Each Hot Standby Routing Protocol (HSRP) standby group has two well-known MACaddresses and a virtual IP address
D.The cypto isakmp keepalive command is used to configure stateless failover

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