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H3C Constructing H3C High-Performance Campus Networks Sample Questions:

1. Multicast applications are based on UDP, so multicast applications have the following shortcomings

A) Repeated data packet reception
B) The problem of out-of-sequence arrival of multicast packets can be corrected
C) No congestion control
D) Do your best to deliver, cannot guarantee low-latency application requirements

2. Regarding the comparison of the calculation convergence of RSTP and STP, the correct statement is

A) Compared with STP, RSTP defines the designated port fast switching mechanism, which can make the designated port quickly enter the forwarding state without waiting for twice the Forward Delay time
B) Compared with STP, RSTP defines a fast root port switching mechanism^ This can make Alternate quickly become a new root port
C) If STP wants to shorten the convergence time, you can only configure a smaller ForwardDelay time, but it may affect the stability of the network
D) Compared with STP, RSTP defines the edge port, which can make the port connected to the i machine quickly enter the forwarding state

3. In the switching network as shown in the figure, VLAN 10 is set as Super VLAN on the switch SWA, VLAN 2 and VLAN 3 are Sub VLANs of VLAN 10, Port Ethernet1/0/3 is Trunk port, PVID is VLAN 1, allowing all VLANs to pass ; Create VLAN2~VLAN20 on the switch SWB, port Ethernet1/0/4 as Trunk port, PVID is VLAN1, allowing all VLANs to pass, after setting the IP address of each device as shown in the figure, check the MAC address table on SWB , It can be judged that PCA belongs to

A) VLAN3
B) VLAN2
C) VLAN 10
D) VLAN 1

4. Regarding the bridge ID of STP, which statement is correct?

A) The bridge with the smallest bridge ID in the network will eventually become the root bridge after STP calculation
B) The MAC addresses of SWA and SWB are 00-E0-FC-00-00-11 and 00-E0-FC-11-00-11, and the priority of the two are 32768 and 4096 respectively. When SWA and SWB are used After ring networking and spanning tree protocol is enabled, SWA will become the root bridge
C) The length of the bridge priority field is 2 bytes, so the value range of the bridge priority is 0-65535
D) Bridge ID is composed of bridge MAC address and priority field. When comparing bridge ID, compare the MAC address first. The smaller MAC address value is preferred.

5. As the basis for the realization of the SNMP protocol, the managed objects in the MIB can be identified by the object name or OID. The following descriptions of the managed objects are correct (multiple choice)

A) The managed object exists in the form of a node, which can be represented by object name or OID, and the two are mapped one by one
B) The nodes in the MIB are divided into leaf nodes and non-leaf nodes. The non-leaf points cannot be accessed
C) Leaf nodes are divided into phenotype nodes and scalar nodes. When the network management workstation accesses the leaf nodes, the instance ID must be added after the leaf node corresponds to the OID.
D) Scalar nodes only have read attributes, not write attributes

Solutions: