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After connecting a PC to an available port on a switch, you find that the PC can not access any of the resources on the LAN. No
After connecting a PC to an available port on a switch, you find that the PC can not access any of the resources on the LAN. No
admin
2009-05-19
72
问题
After connecting a PC to an available port on a switch, you find that the PC can not access any of the resources on the LAN. No other PC’s connected to the switch appear to be having any issues. What is the most likely cause for this problem?
选项
A、The router lacks a routing table entry for the new host
B、The host switch port is assigned to the incorrect VLAN
C、The host MAC address is incorrectly configured
D、A STP instance for the new host has not been initialized
E、The switch does not have the MAC address hard coded in the CAM table.
答案
B
解析
Explanation:
Virtual LANs break up broadcast domains in a layer-two switched internetwork. If a host is in a different VLAN then the network services it needs to use, the packets must go through a router. If routing does not take place, the PC will be unable to communicate with any other devices not in the same VLAN. Answer B is the best answer for this question.
Incorrect Answers:
A. The PC is unable to communicate with other LAN users. No router needs to even be installed for this to work.
C, E. The MAC address of the PC does not need to be entered manually into the switch. The switch will dynamically learn of the MAC address of the PC.
D. The STP algorithm does not need to have any end host information added in order for it to work.
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