How many bits are there in the VLAN ID in the VLAN frame format defined by IEEE802.1Q?

• A.6
• B.10
• C.12
• D.8

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The information shown in the figure is the port status information displayed on a switch running STP. According to this information, what is wrong in the following description? () (Single-choice question)

• A.This network may only contain this switch
• B.This switch may be connected to 6 other switches
• C.The priority of this switch is 0
• D.This switch is the root switch in the network

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The network as shown in the figure. Which of the following configurations can realize that Host A cannot access the HTTP service of Host B.
Host B cannot access the FTP service of Host A? () (Multiple Choice Questions)

• A.acl number 3000
  Rule
  5
  Deny tcp source 100.0.13.0 0.0.0.255 destination 100.0.12.00.0.0.255
  Destination eq www
  #
  Acl number 3001
  Rule
  5 deny tcp source 100.0.12.0 0.0.0.255 destination 100.0.13.00.0.0.255
  Destination eq ftp
  #
  Interface GigabitEthernet0/0/1
  Traffic-filter inbound acl 3000
  #
  Interface GigabitEthernet0/0/2
  Traffic-filter inbound acl 3001
  #
• B.acl number 3000
  Rule
  5
  Deny
  Tep
  Source
  #
  Acl number 3001
  Rule
  5 deny top source 100.0.13.0 0.0.0.255 source-port eq ftp destination
  #
  Interface GigabitEthernet0/0/1
  Traffic-filter inbound acl 3000
  #
  Interface GigabitEthernet0/0/2
  Traffic-filter inbound acl 3001
  #
• C.acl number 3000
  Rule
  5
  Deny tcp source 100.0.13.0 0.0.0.255 destination 100.0.12.00.0.0.255
  Destination eq www
  #
  Acl number 3001
  Rule
  5 deny tcp source 100.0.12.0 0.0.0.255 destination 100.0.13.00.0.0.255
  Destination eq ftp
  #
  Interface GigabitEthernet0/0/1
  Traffic-filter inbound acl 3000
  #
  Interface GigabitEthernet0/0/2
  Traffic-filter inbound acl 3001
• D.acl number 3000
  Rule 5 deny tcp source 100.0.12.0 0.0.0.255 source-port eq www destination Rule
  5 deny tcp source 100.0.13.0 0.0.0.255 source-port eq ftp destination
  #
  Interface GigabitEthernet0/0/1
  Traffic-filter inbound acl 3000
  #
  Interface GigabitEthernet0/0/2
  Traffic-filter inbound acl 3001
  #

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When two OSPF routers form a 2-WAY neighbor relationship, the LSDB. has been synchronized. ()

• A.True
• B.False

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Regarding the role of the ARP protocol and packet encapsulation, which one is correct?

• A.ARP protocol supports deployment on PPP link and HDLC link
• B.The MAC address and UUID address of the destination can be obtained through the ARP protocol
• C.The ARP cache on the network device can only be obtained through the ARP protocol
• D.ARP protocol is based on Ethernet encapsulation

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