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H3C Constructing Small - and Medium - Sized Enterprise Network Sample Questions:

1. The following statement about the functions of each layer of the OSI reference model is wrong.

A) The session layer is responsible for data format processing, data encryption, etc.
B) The application layer is responsible for providing network services for applications.
C) The basic function of the transport layer is to establish and maintain virtual circuits, perform error checking and flow control.
D) The physical layer refers to the original bit stream transmitted on the communication channel (Channel), which defines the mechanical and electrical functions and procedures required for data transmission.
E) The network layer decides the best route for transmitting the message. The key issue is to determine how the data packet is routed from the source to the destination.

2. The WAN link between the two routers MSR-1 and MSR-2 uses the PPP protocol, and RIP is configured on the two routers to advertise routing information to each other. At present, you can see the RIP routes advertised by MSR-2 on MSR-1, but you can't see any RIP routes in the routing table of MSR-2. The possible reason is ______. (Multiple choice)

A) The RIP versions of the two routers are inconsistent
B) The RIP of MSR-2 is configured with silent-interface all
C) The RIP of MSR-1 is configured with silent-interface all
D) MSR-1 only started RIP on the WAN interface, and did not start RIP on other interfaces

3. If a port running STP in the Ethernet switch does not receive or forward data, receive, process and send BPDUs, and perform address learning, the port should be in the ______ state.

A) Blocking
B) Forwarding
C) Waiting
D) Listening
E) Disable
F) Learning

4. The following statement about WAN is wrong. ______.

A) The HDLC protocol only supports point-to-point links, not point-to-multipoint links.
B) The HDLC protocol can be encapsulated on the synchronous link or on the asynchronous link. Only supports synchronization
C) When the CE1/PRI interface uses the CE1/PRI working mode, it is physically divided into 32 time slots, the corresponding numbers are 0~31, of which time slot 0 is used to transmit synchronization information.
D) When the CE1/PRI interface uses E1 working mode, it is equivalent to an interface with no time slot division and a data bandwidth of 2Mbps. Its characteristics are the same as the synchronous serial port, supporting PPP, frame relay, LAPB and X.25 And other data link layer protocols, supporting network protocols such as IP and IPX.

5. The two MSR routers are interconnected back-to-back through their respective Serial1/0 interfaces, and the PPP link layer protocol is encapsulated on the WAN interface. The correct statement about the PPP link in this network is ______. (Multiple choice)

A) If PPP authentication is not configured on both ends, the PPP link cannot be established normally
B) When the PPP link starts to be established, the LCP and NCP negotiation starts at the same time
C) IPX protocol can be carried on this PPP link
D) The type of network layer protocol carried on the PPP link needs to be determined in the NCP negotiation

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