What is the correct statement about the ip-link feature?

• A.ip-link is a function to detect link connectivity
• B.ARP detection mode only supports detecting direct links (or forwarding through Layer 2 devices in the middle)
• C.The firewall sends ICMP or ARP packets to a probe destination address to determine whether the destination address is reachable.
• D.ip-link is associated with VGMP, the ip-link status is down, and the VGMP management group priority is lowered by default.

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Using the virtual firewall technology, users on the two VPNs can log in to their private VPNs through the Root VFW on the public network to directly access private network resources. What are the following statements about the characteristics of the VPN multi-instance service provided by the firewall?

• A.The access control authority is strict. The firewall can control the access rights of the VPN according to the user name and password. This allows different users such as travel employees and super users (need to access different VPN resources) to have different access rights.
• B.is easy to maintain, users can manage the entire firewall (including each virtual firewall) without a system administrator account with super user privileges.
• C.security is high, VPN users access through the firewall authentication and authorization, access after access is to use a separate virtual firewall system to manage users, the resources of different VPN users are completely isolated
• D.VPN access mode is flexible and reliable. It can support from public network to VPN, and can also support from VPN to VPN.

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A company deploys the LogCenter log event management system, can meet which of the following requirements? (Multiple choices)

• A.Wireless Broadband Cluster Device Management
• B.NAT traceability
• C.Smart configuration
• D.Report Analysis

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In the application scenario of the virtual firewall technology, the more common service is to provide rental services to the outside. If the virtual firewall VFW1 is leased to enterprise A and the virtual firewall VFW2 is leased to enterprise B, what is the following statement incorrect?

• A.is transparent to users, and the business between enterprise A and enterprise B is completely isolated, just like using firewalls separately.
• B.The A system provides independent system resources for the virtual firewalls VFW1 and VFW2, and does not affect each other.
• C.Enterprise A and Enterprise B can overlap addresses and use VLANs to separate different VLANs.
• D.Enterprise A and Enterprise B cannot manage their own virtual firewalls independently and must be managed by the administrator of the lessor.

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The bandwidth management function only supports limiting the number of connections initiated by a specified IP.

• A.True
• B.False

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