The MAC address table on a layer 2 switch is shown in the figure.

When the switch receives a frame with a destination MAC address of 00-13-72-8E-4B-C1 from the E1/0/2 interface, the switch will ______ the frame.

• A. send out from E1/0/4 interface
• B. Send out from the E1/0/1 interface
• C. send out from all interfaces on the switch
• D. Send out from the E1/0/2 interface
• E. Send out from the E1/0/3 interface
• F. Discard directly

The WAN link between the only two routers MSR-1 and MSR-2 in the customer network adopts the PPP protocol, and the two ends learn each other's routes by configuring RIP. Currently, the route learning is normal, and now it is in the RIP of MSR-1. The following commands are added to the configuration:
[MSR-1-rip-1] silent-interface all
So ______ . (Multiple choice)

• A. 10 minutes after configuring this command, the RIP route in the MSR-2 routing table disappears
• B. This command makes all interfaces of MSR-1 only receive routing updates without sending routing updates
• C. This command makes all interfaces of MSR-1 only send routing updates and not accept routing updates
• D. 10 minutes after configuring this command, the RIP route in the MSR-1 routing table disappears

An MSR router needs to learn routing information through RIP, and the following configuration is made on the router: rip 1 network 0.0.0.0 Then the correct explanation for this configuration is ______.

• A. When RIP is not enabled on this router
• B. This configuration is incorrect
• C. All interfaces on this router enable RIP
• D. RIP will publish a default route of 0.0.0.0

The user router S0/0 is connected to the frame relay network, and the following information is displayed on the interface of the router: Serial1/1 current state:UP Line protocol current state:DOWN Internet Address is 3.3.3.2/24 The protocol state of the interface is DOWN, Then analyze ______ accordingly.

• A. If the interface is encapsulated with the Frame Relay protocol, the status of the PVC should be DOWN at this time
• B. The encapsulated LMI type may be inconsistent with the remote end
• C. The interface may encapsulate the PPP protocol
• D. The physical link may be faulty

Two MSR routers are directly connected through their respective GigabitEthernet 0/0 interfaces, and one of the MSR routers sees the following configuration:
interface LoopBack2
ip address 8.8.8.8 255.255.255.255
#
interface GigabitEthernet0/0
port link-mode route
ip address 100.1.1.2 255.255.255.0
#r
ip 1
undo summary
version 2
network 100.0.0.0
network 8.0.0.0
Assuming that the routers at both ends are configured with RIP correctly, according to this configuration, which of the following analyses are correct?

• A. The opposite router will learn the RIP route of 8.0.0.0/8
• B. The opposite router will learn the RIP route of 8.8.8.8/32
• C. Turning off aggregation means that different subnets in the natural network segment are sent with natural mask routes
• D. Turning off aggregation means that the subnet mask information of the natural network can be transmitted through RIP