UDP cannot guarantee the reliability of data transmission, and does not provide the functions of message sequencing and flow control. It is suitable for flows with low transmission reliability requirements but high transmission speed and delay requirements.
()

A.

True

B.

False

Which of the following are related to the purpose of encapsulation and decapsulation? ()

A.

Encapsulation and decapsulation can complete network fault location

B.

Encapsulation and decapsulation are important steps to realize the functions of different protocols

C.

Interworking between different networks

D.

Shorten the length of the message

As shown in the figure below. Host A and Host B cannot communicate. ()(True or False)

A.

True

B.

False

Use the ACL shown in the figure on the router RTA to match routing entries. Then which of the following entries will be matched?
(RTA) acl 2002
(RTA-acl-basic-2002) rule deny source 172.16.1.1 0.0.0.0
(RTA-acl-basic-2002) rule deny source 172.16.0.0 0.255.0.0

A.

172.18.0.0/16

B.

172.16.1.0/24

C.

192.17.0.0/24

D.

172.16.1.1/24

Which of the following methods can read data non-blocking in Python's telnetliB.? ()

A.

telnet_read_very_lazy

B.

telnet._read_eager

C.

telnet_reaD._very_eager

The network shown in the figure below. The router receives a data packet with a
destination IP address of 11.0.12.1 from host A. After this data is forwarded by the router,
what are the destination MAC and destination IP? )(Single-choice question)

A.

MAC-B.11.0.12.1

B.

MAC-D.10.0.12.2

C.

MAC-D.11.0.12.1

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

A.

12

B.

6

C.

10

D.

8

The network shown in the figure below. The network where host A is required to access the Internet through Easy IP, then which of the following ACLs should be used on the G0/0/3 interface of router A? () (Single-choice question)

A.

acl number 2000 Rule 5 permit source 10.0.12.0.0.0.0.255#

B.

acl number 2000 Rule 5 permit source 10.0.13.0.0.0.0.255#

C.

acl number 2000 Rule 5 permit source 10.0.12.1.0.0.0.0#

D.

acl number 2000 Rule 5 permit source 10.0.13.1.0.0.0.0

Which packet type is used by network devices running the SNMPv1 protocol to actively send alarm information? ()

A.

Trap

B.

Response

C.

Get Request

D.

Get-Next Request

Protocol Priority Switch A. and Switch B. adopt LACP mode link aggregation, and all interfaces join the link aggregation group. At the same time, set the maximum number of
active ports to 3. Then which port of switch A is not an active port? ()

A.

G0/0/1

B.

G0/0/3

C.

G0/0/0