? 發問時間: 社會與文化語言 · 1 0 年前

有關於CCNA的題目,請高手幫幫忙 ,Thanks

15. What does the Wi-Fi logo indicate about a wireless device?

IEEE has approved the device.

The device is interoperable with all other wireless standards.

The device is interoperable with other devices of the same standard that also display the Wi-Fi logo.

The device is backwards compatible with all previous wireless standards.

16. Why is IEEE 802.11 wireless technology able to transmit further distances than Bluetooth technology?

transmits at much lower frequencies

has higher power output

transmits at much higher frequencies

uses better encryption methods

17. What is the difference between using open authentication and pre-shared keys?

Open authentication requires a password. Pre-shared keys do not require a password.

Open authentication is used with wireless networks. Pre-shared keys are used with wired networks.

Pre-shared keys require an encrypted secret word. Open authentication does not require a secret word.

Pre-shared keys require a MAC address programmed into the access point. Open authentication does not require this programming.

18. Complete the following sentence: WEP is used to ______ , and EAP is used to _____ wireless networks.

encrypt; authenticate users on

filter traffic; select the operating frequency for

identify the wireless network; compress data on

create the smallest wireless network; limit the number of users on

19. What are the two WEP key lengths? (Choose two.)

8 bit

16 bit

32 bit

64 bit

128 bit

20. What are two benefits of wireless networking over wired networking? (Choose two.)

speed

security

mobility

reduced installation time

allows users to share more resources

not susceptible to interference from other devices

21. Refer to the graphic. In the Wireless menu of a Linksys integrated router, what configuration option allows the presence of the access point to be known to nearby clients?

Network Mode

Network Name (SSID)

Radio Band

Wide Channel

Standard Channel

SSID Broadcast

3 個解答

評分
  • 1 0 年前
    最佳解答

    15.The device is interoperable with other devices of the same standard that also display the Wi-Fi logo.

    16.has higher power output

    17.Pre-shared keys require an encrypted secret word. Open authentication does not require a secret word.

    18.encrypt; authenticate users on

    19.64 bit

    128 bit

    20.mobility

    reduced installation time

    21.SSID Broadcast

  • 1 0 年前

    哈,題目好像都是跟無線網路有關,好像是去年才開始加入考題的。

  • JC
    Lv 5
    1 0 年前

    網路世界真是日新月異啊

    現在的CCNA已經考到這麼難了喔

    ... 過期的CCNA ...

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