Network Implementation第 25 / 100 题
Which technology allows a switch to supply electrical power to devices such as IP phones and access points over the data cable?
a.QoS
b.STP
c.PoE
d.NAT
解析
Power over Ethernet (PoE) delivers electrical power and data over the same twisted-pair cable, powering devices like IP phones, cameras, and access points. This removes the need for separate power adapters. Standards include 802.3af, 802.3at, and 802.3bt.
免费刷完整 100 道题库 — 无需注册。
同考点相关题目
- An administrator is terminating a straight-through Ethernet cable using the T568B standard on both ends. Which pin arrangement starts the sequence?
- When implementing inter-VLAN routing on a single router interface, what configuration is required?
- A wireless network must support the highest client density in a crowded office. Which deployment choice best reduces co-channel interference on 2.4 GHz?
- Which routing protocol is a link-state interior gateway protocol that uses cost based on bandwidth as its metric?
- An engineer configures a static route of last resort. Which destination and mask represent the default route?
- Which protocol prevents Layer 2 switching loops by placing redundant links into a blocking state?