L2TP is a tunneling protocol set up for transparent transmission of PPP packets between users and enterprise servers. Which of the following features are included?

• A.supports private address allocation and does not occupy public IP addresses.
• B.L2TP protocol uses the TCP protocol
• C.and PPP configurations support authentication and work with Radius to support flexible local and remote AAA After combining with IPSec,
• D.supports encryption of packets.

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Regarding VRRP messages, what are the following statements correct?

• A.The TTL value of the D VRRP packet is 255.
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• B.VRRP uses TCP packets.
• C.VRRP uses UDP packets.
• D.The destination address of the C VRRP packet is 224.0.0.18.

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L2TP is used between the user and the enterprise server and it transparently transmits packets and sets up the PPP tunneling protocol, which includes which of the following characteristics? (Choose three answers)

• A.It supports PPP authentication with RADIUS support with flexible local and remote AAA
• B.L2TP protocol uses TCP protocol
• C.Support private address assignment; do not take the public IP address
• D.After combining with IPsec support for encrypted packets

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The principle of HTTPS Flood source authentication defense is that the Anti-DDoS device replaces the SSL server with the client to complete the TCP three-way handshake. If the TCP three-way handshake is complete, the HTTPS flood source authentication check is successful.

• A.TRUE
• B.FALSE

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On the following virtual firewall network, the USG unified security gateway provides leased services to the enterprise. The VPN instance vfw1 is leased to enterprise A.
The networking diagram is as follows. The PC C of the enterprise A external network user needs to access the intranet DMZ area server B through NAT. To achieve this requirement, what are the following key configurations?

• A.[USG] ip vpn-instance vfw1 vpn-id
• B.[USG] ip vpn-instance vfw1 [USG-vpn-vfw1] route-distinguisher 100:1 [USG-vpn-vfw1] quit
• C.[USG] nat server zone vpn-instance vfw1 untrust global 2.1.2.100 inside 192.168.1.2 vpn-instance vfw1
• D.[USG]nat address-group 1 2.1.2.5 2.1.2.10 vpn-instance vfw1

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