Which statement about the 0SPF protocol DR is correct? ()

A.

DR must be the highest priority device in the network

B.

Router ID, the larger the value, the more preferred it is to be elected as DR

C.

DR election is preemptive

D.

An interface priority is 0, then the interface cannot be a DR

VLAN4095 cannot be created on Huawei switches, and VLAN1 cannot be created ()

A.

True

B.

False

Which of the following descriptions about the switch is wrong?

A.

The switch is generally used as the export equipment of the network

B.

Switches generally work at the data link layer

C.

The switch can complete the exchange of data frames

D.

The switch can provide network access services for terminal devices (PC/server)

What kind of packets does the OSPF protocol use to send LSAs to neighbors? ()

A.

LSU

B.

LSACK

C.

LSR

D.

LSA

What is the destination IP address of the DHCP DISCOER message? ()

A.

127.0.0.1

B.

224.0.0.1

C.

224.0.0.2

D.

255.255.255.255

Management Information Base (MIB) Information Base) is a virtual database, this database only exists on NMS. ()

A.

True

B.

False

In the network as shown in the figure below, host A logs in to router A through Telnet. Then obtains the configuration file of router B through FTP on the remote interface. At this time, how many TCP connections does router A have? () (Single-choice question)

A.

1

B.

3

C.

2

There are multiple route entries to the same destination network in the routing table. These routes are called? ()

A.

Suboptimal routing

B.

Multipath routing

C.

Default route

D.

Equal cost routing

In the network shown in the figure below, when the 0$PF neighbor status is stable. What is the neighbor status of Router B and Router C?

A.

2-way

B.

Attempt

C.

Down

Which of the following IEEE802.11 standards does not support communication in the 5GHz frequency band? ()

A.

802.11g

B.

802.11n

C.

802.11aC.wave 1