Port isolation provides secure and flexible networking solutions for users. Which of the following statements regarding port isolation is false?
A. Port isolation can be used for configuring Layer 2 isolation.
B. By default, interfaces are isolated at Layer 2 but can communicate at Layer 3.
C. Before the port isolation function takes effect on an interface, the port isolation function must be enabled.
D. The port-isolate enable command can run in the system view.
Which of the following statements regarding MUX VLAN is false?
A. Each group VLAN must be bound to a principal VLAN.
B. If the VLAN ID has been used by the principal VLAN, this VLAN cannot be used for the VLANIF interface, super-VLAN, or sub-VLAN.
C. After MUX VLAN is enabled on an interface, VLAN mapping and VLAN stacking can be configured on the interface.
D. An enterprise can use the principal port to connect to the enterprise server, a separate port to connect to enterprise customers, and a group port to connect to enterprise employees. Enterprise customers and employees can both access enterprise servers, enterprise employees can communicate with each other, enterprise customers cannot communicate with each other, and enterprise customers and employees cannot communicate with each other.
Which of the following statements regarding the static LACP mode are false?
A. If a high bandwidth of the link between two directly connected devices is required bot the remote device does not support LACP, you can use the manual load balancing mode.
B. In static LACP mode, a larger LACP priority of an interface indicates a higher priority of the interface and a high probability of becoming the active interface.
C. The interface that forwards data is called the active interface, whereas the interfaces that does not forward data is called the inactive interface. The backup interface changes from inactive to active only when the active interface dails.
D. When preemption is enabled and an active interface fails, the backup interface with a larger priority becomes the active interface after a delay. If preemption is disabled, the faulty interface cannot automatically become the active interface.
Which of the following statements regarding join member interfaces are false when link aggregation works in manual mode?
A. An Eth-Trunk cannot be nestled, and a member interface cannot be an Eth-Trunk.
B. An Ethernet interface can join only one Eth-Trunk. Before adding an Ethernet interface to an Eth-Trunk,
ensure that the Ethernet interface does not belong to any other Eth-Trunk.
C. If the local device uses the Eth-Trunk, the remote interface directly connected to the member interface must join the Eth-Trunk so that both ends can communicate.
D. An Eth-Trunk can work in Layer 2 or Layer 3 mode. The two working modes can be identified automatically and do not need to be switched manually.
If one routing protocol only needs to import part of the routing information of another routing protocol and set attributes of the imported routes, only the route-policy can meet this requirement.
A. TRUE
B. FALSE
Which of the following protocols support the any-source multicast (ASM) model? (Choose two.)
A. PIM-SM and IGMPv2
B. PIM-SSM and IGMPv3
C. MBGP and MSDP
D. PIM-DM and IGMPv2
Which of the following statements regarding routing policies is true?
A. Routing policies control packet forwarding based on destination addresses in the routing table.
B. Routing policies are based on the forwarding plane and serve forwarding policies.
C. A routing policy needs to be manually configured hop by hop to ensure that packets are forwarded according to the policy.
D. A routing policy is configured using the policy-based route command.
Which of the following statements regarding PIM-DM is false?
A. PIM-DM stands for Protocol Independent Multicast-Dense Mode. It is a dense-mode multicast routing protocol.
B. PIM-DM assumes that each subnet on a network has at least one receiver station interested in the multicast source.
C. PIM-DM uses the graft mechanism to restore multicast packet forwarding proactively.
D. PIM-DM does not have periodic flood-prune processes.
BGP is an interdomain routing protocol. Which of the following statements regarding BGP are true? (Choose two.)
A. BGP uses a reliable transport protocol.
B. BGP supports automatic neighbor discovery.
C. BGP supports plaintext authentication.
D. BGP supports rich routing policies.
Which of the following statements regarding AS_Path is false?
A. AS_Path is a list of ASs that a BGP route passes through.
B. AS_Path is a very important well-known mandatory attribute in BGP.
C. BGP does not accept the routes whose AS_Path attribute contains the local AS number.
D. When a router has two or more routes to the same destination, the router compares the AS_Path attributes of these routes and prefers the route with the longer AS_Path attribute.
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