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A technician receives an urgent call that the switch in acco

题目
单选题
A technician receives an urgent call that the switch in accounting is down. Which of the followingshould the technician do FIRST to troubleshoot this issue?（）
A

Identity symptoms and problems

B

Document the process and solutions

C

Establish the most probable cause

D

Escalate if necessary.

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相似问题和答案

第1题：

A technician receives an urgent call that the switch in accounting is down. Which of the followingshould the technician do FIRST to troubleshoot this issue?()

A. Identity symptoms and problems

B. Document the process and solutions

C. Establish the most probable cause

D. Escalate if necessary.


参考答案：A

第2题：

What will an Ethernet switch do if it receives a unicast frame with a destination MAC that is listed in the switch table()。

A.The switch will not forward unicast frames.

B.The switch will forward the frame to a specific port.

C.The switch will return a copy of the frame out the source port.

D.The switch will remove the destination MAC from the switch table.

E.The switch will forward the frame to all ports except the port on which it was received.


参考答案：B

第3题：

A Ezonexam Ethernet switch receives a unicast frame. with a destination MAC that is listed in the switch table. What will this switch do with the frame?

A. The switch will forward the frame. to a specific port

B. The switch will forward the frame. to all ports except the port on which it was received

C. The switch will return a copy of the frame. out the source port

D. The switch will not forward unicast frames

E. The switch will remove the destination MAC from the switch table

F. None of the above.


正确答案：A
A 解析：Explanation:
How Does the Switch Find Host MACs?
Let's use the diagram below to help us understand how address learning process takes place.


Let's assume that we have just powered on the switch. It has nothing in its MAC table. We connect the cables from the hosts on the switch interfaces as shown in the diagram. Host A initiates a connection towards Host D, and the following takes place:
1. Host A (interface fe0/0) sends a frame. to Host D (MAC address:0000.43c5.334c).

2. The switch inspects the Source Address in the frame. and notes in its table the MAC address of Host A along with the Interface number from which the frame. originated.

3. The switch inspects the Destination Address in the frame. Since it does not have Hosts D MAC address in its table, it constructs a broadcast frame. and forwards out all interfaces except the interface from where the original frame. arrived.

4. Host D identifies itself as the expected recipient and responds back to Host A. The switch receives the respond frame. on interface fe0/11 and places the SA in its table along with the interface number where the frame. came from.

5. From now on, further communication between the two hosts will be switched to the appropriate interfaces based on the MAC tables entries.

This process takes place every time a new host is attached on the switch and initiates traffic. The switch tries to keep its MAC table up-to-date, therefore if some hosts do not initiate traffic for a certain amount of time, the switch removes them from its table and reinserts them when they begin sending traffic.

第4题：

如果用DSC设备转发遇险报警信息，在DSC上选择（）

  • A、DISTRESS ALTER
  • B、URGENT CALL
  • C、DISTRESS RELAY
  • D、SAFETY CALL

正确答案:C

第5题：

A VPN connection is not working correctly and the technician is unable to ping the VPN server. Which of the following actions should the technician do FIRST?（）

  • A、Call their local ISP
  • B、Verify the IP information of the server
  • C、Check their local Internet connection
  • D、Verify the hostname of the server

正确答案:C

第6题：

A technician receives a call on monday morning that several computers will not connect to the network.The technician determines that the computers left on over the weekend are functional and those that were turned off over the weekend are not functioning.Which of the following is the MOST likely source of the problem?（）

A.DHCP is not functioning.

B.WINS needs to be restarted.

C.DNS is not functioning.

D.LDAP is not functioning.


参考答案：A

第7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

正确答案:B

第8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


参考答案：B

第9题：

A technician receives a computer for repair and observes that the fan on the power supply is not moving. Which of the following should the technician do？ （）

  • A、Move the power supply voltage switch to 220 volts.
  • B、Add an additional fan to help cool the computer.
  • C、Replace the cable that attaches the power supply to the motherboard.
  • D、Replace the power supply.

正确答案:D

第10题：

如果用DSC转发他船的遇险信息，操作时应选择（）

  • A、DISTRESS ALERT
  • B、URGENT CALL
  • C、DISTRESS RELAY
  • D、SAFETY CALL

正确答案:C

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