A link light on a switch is an example of which of the following Ethernet properties?（）

单项选择题In order for computers with private IP addresses to access the public Internet, which of thefollowing must the router perform?（）

A.NAT
B.BGP
C.DHCP
D.APIPA

单项选择题A SONET network typically uses which of the following transmission media?（）

A. Single-mode fiber
B. Multimode fiber
C. Copper
D. Wireless

单项选择题A workstation is having connectivity issues when being added to the domain. Which of the following commands would allow the administrator to see the DNS and WINS servers that are currently configured for the workstation?（）

A.Ipconfig
B.Nslookup
C.Netstat
D.Nbtstat

单项选择题Which of the following network appliances can BEST be described as allowing multiple servers toshare requests for a website through the same public IP address?（）

A. VPN concentrator
B. Content filter
C. Load balancer
D. Proxy server

单项选择题A network technician wants to use a packet analyzer to troubleshoot a reported problem with a users workstation with IP address 192.168.1.45. To identify the workstations packets the technician wants to use the workstations MAC address. Which of the following protocols would provide the needed information?（）

A.DHCP
B.ARP
C.DNS
D.PING