• A.This device is AER
• B.The LSA in Figure is generated by Xinyi
• C.The destination network described by this LSA is 10.0.23.0/24
• D.The type of the LSA is AS-tenaL-L84

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Current enterprise networks usually use OSPF as the routing protocol.
What precautions are there when OSPF is used? (Choose four.)

• A.Determine that the backbone area will not split.
• B.Check whether secondary optimal routes exist on the network according to OSPF route selection rules.
• C.Verify that OSPF costs can correctly demonstrate the actual bandwidth of links at more than 100 Mbit/ s.
• D.Check whether all non-backbone areas are correctly and reliably connected to the backbone area.
• E.Check the OSPF network topology and ensure that no loop exists when OSPF routes are being calculated.

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Huawei's USG6X00 series firewalls belong to the UTM firewall product and support stateful inspection packet filtering as well as intrusion detection, anti-virus, and URL filtering.

• A.TRUE
• B.FALSE

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Ethernet supports broadcast. Once a network loop occurs, this simple broadcast mechanism will cause catastrophic consequences. Which of the following symptoms may be caused by a loop? (Multiple Choice)

• A.The display interface command output shows a large number of broadcast packets received on an interface.
• B.A lot of ICMP packets are lost in ping tests.
• C.The CPU usage exceeds 70%.
• D.Users cannot log in to the device remotely.

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