单项选择题

A second network card in a server that activates if the primary card fails is an example of which of the following network performance optimization？（）

A.Load balancing
B.QoS
C.High availability
D.Fault tolerance

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单项选择题

Routing convergence time is which of the following？（）

A.Time required for a VPN connection to occur
B.Time required by protocols to update their forwarding tables after changes have occurred
C.Time required for an IDS to detect suspicious software
D.Time required by switch ports to update their link status and transition to the forwarding state

单项选择题

A technician is installing a basic router for a SOHO network. After installing the router the PCs connected to it are not able to acquire an IP address. Which of the following did the technician fail to configure correctly？（）

A.DHCP
B.DNS
C.WINS
D.NAT

单项选择题

Which of the following is the MOST common pin-out configuration used when crimping RJ-45 connectors？（）

A.UTP
B.T568A/B
C.STP
D.IEEE 802.5