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?（）

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

单项选择题A technician needs to manage a switch by using the management port on the back of the switch.Which of the following cables would the technician use?（）

A.Straight
B.Console
C.Crossover
D.Loopback

单项选择题Which of the following would MOST likely be used to punch down LAN cables before connecting them to the main switch?（）

A. IDF
B. 66 block
C. MDF
D. 110 block

单项选择题In which of the following layers of the OSI model does the TCP protocol operate?（）

A.Session
B.Network
C.Data link
D.Transport

单项选择题Which of the following ports does POP3 services use, by default?（）

A.25
B.110
C.143
D.443