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H3CSE-RS-SW Sample Questions:

1. How does Overlay technology solve the problems and challenges encountered in the development of cloud computing? (Multiple choice)

A) For the Underlay network, the data packets of the Overlay network are just forwarding of the tunnel endpoint address, so the MAC address specification requirements of the Underlay network (especially the access switch) are greatly reduced.
B) Overlay expands the number of isolation identification bits. Compared with using VLAN to achieve network isolation, the isolation capability of Overlay network is greatly improved.
C) Overlay network only needs edge devices to support Overlay, and the middle Underlay network can use traditional devices, which can protect existing investments and facilitate technology implementation.
D) Overlay encapsulates the Layer 2 message in the IP message, allowing the virtual machine to achieve Layer 2 intercommunication across the Layer 3 network

2. After executing the display interface Ethernet 1/0/1 command on the switch SWA, the output information is as follows: From the above output, what can be inferred from the above output?
[SWA] display interface Ethernet 1/0/2
Ethernet1/0/2 current state: UP
.............
PVID: 10
Mdi type: auto
Link delay is 0 (sec)
Port link-type: trunk
VLAN passing: 1 (default vlan), 10
VLAN permitted: 1 (default vlan), 2-4094
Trunk port encapsulation: IEEE 802.1q
Port priority: 0

A) Data frames with VLAN1 tags will be discarded when they enter port Ethernet 1/0/1
B) The data frame with VLAN10 tag will be stripped of the tag when it leaves port Ethernet 1/0/1
C) The data frame with VLAN10 tag will not be stripped when it leaves port Ethernet 1/0/1.
D) The data frame with VLAN10 tag is discarded when it enters port Ethernet 1/0/1

3. In the network connection shown in the figure, SWA and SWB both have STP and Loopback- detection enabled. Please confirm that which of the following status description of each port of SWA and SWB is correct?

A) Loopback-detection detects a loop between G1/0/2 and G1/0/3 of SWB and blocks one of them.
B) SWA's G1/0/1 may be blocked because STP detects a loop.
C) STP detects a loop between G1/0/2 or G1/0/3 of SWB and blocks one of them.

4. The basic idea of STP to eliminate loops is? (Multiple choice)

A) If there are redundant paths in the network, block the redundant links according to certain rules.
B) Prune the network into a tree topology
C) Select a root node according to certain rules
D) Non-root nodes select the best path to connect to the root node

5. Which of the following statements about layer 3 switches is correct? (Multiple choice)

A) The three-layer switch contains two parts: the layer 2 VLAN forwarding engine and the layer 3 forwarding engine
B) The Layer 3 forwarding engine of a Layer 3 switch is equivalent to the function of a router in a traditional network, using hardware ASIC technology to implement Layer 3 routing forwarding across network segments
C) The three-layer switch realizes the functions of VLAN division, two-layer switching within VLAN and inter-VLAN routing.
D) The Layer 3 switch actually combines some functions of the Layer 2 switch and router, improving network integration and enhancing forwarding performance.

Solutions: