A technician receives a laptop that is running out of battery power more quickly than expected.Which of the following can the technician do to correct the problem？ （）

A、Note on the work order that the laptop is losing battery capabilities and the laptop must be replaced.

B、Replace the battery by purchasing a new battery from the manufacturer.

C、Stop using the battery and use alternating current （AC） power for the laptop.

D、Replace the AC adaptor by purchasing a new adapter from the manufacturer.

A user opens a webpage that requires the transmission of packets from the Web server to the client's browser. The packets transmitted from the Web server to the client exceed the smallest MTU value on the communications path. Which two protocol functions allow this type of communication?（）

packet segmentation

serialized checking

packet sequencing

parallel checking

What are two Junos processes?（）

OSPF SPF daemon (ospfd)

SNMP daemon (snmpd)

BGP daemon (bgpd)

Routing protocols daemon (rpd)

The IP address 192.168.100.1 belongs to which class of IP address space?（）

A、Class A

B、Class B

C、Class C

D、Class D

在大型建筑物的低层、地下商场、地下停车场等环境下，移动通信信号弱，手机无法正常使用，形成了移动通信的（）和（）。

A、切换区域

B、盲区

C、拥塞区域

D、阴影区

使用（）命令可以用于跟踪数据包经过的路径及到达每个节点的时间。