Network ImplementationCâu 25 / 100
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
Giải thích
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.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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Đội Ngũ Biên Tập PrepPass · Đối chiếu với CompTIA Network+ (N10-009) · Quy trình kiểm tra