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Regarding the MPLS basic forwarding process, the following description is incorrect? Radio
A. When the P message enters the MPLS domain, check whether the Tunel lD value corresponding to the destination IP address is Ox0O If the Tunel IlD value is Ox0 Then enter the MPLS forwarding process.
B. The transport node device replaces the existing top-of-stack label (outermost label) with the label assigned by the next hop device.
C. When an IP message enters the MPLS domain, the MPLS boundary device inserts a new label between the layer 2 header and the IP header.
D. By default, the PHP-enabled Erass node assigns a label value of 3 to the inverted second-hop node.
Answer: A
The following statement about IPSec VPN is correct
A. The two routers can establish an OSPF neighbor relationship through the IPSec VPN (19) channel and exchange intranet devices by
B. Brutal mode can support NAT traversal, while main mode does not support NAT traversal.
C. The two routers establish IPSecVPN in main mode, and from the 5th message (included), the payload's data is often encrypted.
D. Two routers establish an IPSec VPN in brutal mode, so that the tunnel is built with a minimum of 4 messages interacting between the two devices.
Answer: A,C
In VXLAN scenarios, what features can be turned on to reduce flooding of ARP messages between VTEPs?( Multiple select).
A. Local ARP agent
B. ARP broadcast suppression
C. Host Information Collection
D. port isolation
Answer: A,B
The following description of the CHAP authentication function in the PPP protocol is correct?(Multiple choice questions).
A. The user name must be configured under the authenticated party interface for CHAP authentication
B. can also be configured without the authenticated party interface Using the authentication sequence ID, random number, and key, a Hash value
C. If the authenticator does not have a username configured, password
D. is calculated using the MD5 algorithm Three message interactions are required for authentication, and only the user name is transmitted on the network without the password
Answer: A,B,D
When deploying BGP/MPLS IPVPN, OSPF's VPN route tag is not present. The extended properties of MP-BGP are passed only locally, only locally, and only meaningful on routers that receive MP-BGP routes and generate OSPF LSAs.
A. FALSE
B. TRUE
Answer: B
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