Packet-switching wireless networks are preferable（66)when transmissions are（67)bemuse of t

A . Click the Connect to a network link， right-click the appropriate network， and then click the Connect option. B . Click the View computers and devices link， right-click the wireless router， and then click the Enable option. C . Click the Set up a connection or network link， and then click the Set up a wireless Ad hoc network option. D . Click the Set up a connection or network link， and then click the Manually connect to a wireless network option.

A .  by securely deploying new applications with appropriate performance levels B .  by providing security that is based on a multilayer，system-level approach C .  by looking subjectively at network traffic for abnormal flows D .  by requiring a host-based hardware applicatio

A . BSS B . ESS C . IBSS D . SSID

A .  handheld computers B .  imaging phone devices C .  media phones D .  tablet PC

A . TKIP protects RC4 encryption keys B . CKIP and TKIP protect AES encryption keys C . TKIP encryption is more processor intensive than AES encryption is D . WPA requires TKIP encryption， whereas WPA2 supports AES encryption E . WPA requires AES encryption， whereas WPA2 supports TKIP encryptio

A . 有线隐藏技术 B . 无线相容性认证 C . 无线可靠性认证 D . 无线局域网技术

A .  network unification B .  network management C .  mobility platform D .  client device

A .  unified wireless and wired infrastructure for a single point of control for all WLAN traffic B .  simplified management of central or remotely located access points C .  extension features to wired network services， such as denial of service prevention and ACLs D .  threat defense with a robust wired IDS

A . duplicate sender packets B . unicast packet retry rate C . unicast packet retry ratio D . association rejectio

A .  In the autonomous access point solution， control is provided by the WLAN controller. B .  In the lightweight access point solution， WLAN management is provided by the WLAN Control  System （WCS）. C .  In the autonomous access point solution， control is provided by the WDS （Wireless Domain  Services）. D .  Cisco Aironet autonomous access points cannot be supported by the Cisco Unified Wireless  Network. E .  Ii the lightweight access point solution， WLAN management is provided by the WLAN Solution  Engine （WLSE）. F .  Cisco Aironet lightweight access points cannot be supported by the Cisco Unified Wireless  Network.

A . A TACACS+ server is required to implement 802.1x. B . MIC protects against man-in-the-middle and replay attacks. C . The 802.1x standard provides encryption services for wireless clients. D . The AES （symmetric block cipher） is specified in the IEEE 802.11i specification. E . The IEEE 802.11i specification uses RC4 as its encryption mechanism. F . WPA requires TKIP and AES as encryption methods.

A . WMM using DCF B . WMM using EDCAF C . 802.1e using DCF D . 802.1e using EDCAF

A . using adapters and access points manufactured by the same company B . overlapping the wireless cell coverage by at least 10% C . configuring all access points to use the same channel D . utilizing MAC address filtering to allow the client MAC address to authenticate with the surrounding AP

A . Change the Network Category setting of the wireless connection to Public. B . Enable the Internet Connection Sharing feature on the wireless network adapter. C . Rename the wireless network adapter to match the Service Set Identifier （SSID） of the wireless network. D . Configure the wireless network adapter to connect to the appropriate wireless network from the Connect to a network list.

A . passed by the AP to its connected switch and then forwarded directly to the connected router，which creates an MGID table entry B . passed by the AP to the WLAN controller and then forwarded to the source PIM-enabled router，which creates an MGID table entry C . passed by the AP to the WLAN controller， which creates an MGID table entry before forwarding to the directly connected PIM-enabled router D . passed by the AP to its connected switch and then forwarded to the rendezvous point router，which creates an MGID table entry

A .  1. Access point sends probe request .2. Client sends probe response.3. Client initiates  association.4. Access point accepts association.5. Client adds access point MAC address to  association table. B .  1. Client sends probe request.2. Access point sends probe response.3. Client initiates  association.4. Access point accepts association.5. Access point adds client MAC address to  association table. C .  1. Client sends probe request.2. Access point sends probe response.3. Access point initiates  association.4. Client accepts association.5. Access point adds client MAC address to association  table. D .  1. Access point sends probe request .2. Client sends probe response.3. Client initiates  association.4. Access point accepts association.5. Access point adds client MAC address to  association table. E .  1. Client sends probe request.2. Access point sends probe response.3. Client initiates  association.4. Access point accepts association.5. Client adds access point MAC address to  association table. F .  None of the other alternatives apply.

A . average signal strength that is greater than -67 dBi B . cell overlap of 15 to 20 percent C . uneven wireless coverage D . absence of coverage hole

A . WLAN controllers B . WLAN Solution Engine （WLSE） C . Cisco Wireless Control System （WCS） D . Cisco Wireless Location Appliance E . lightweight access point （AP） F . autonomous access point （AP）

A .  centralized management for autonomous access points B .  centralized management for lightweight access points C .  integration with the Location Appliance to expand real time tracking to 1500 devices for 30 days D .  integration with the Location Appliance to expand real time tracking to 2500 devices for 15 days E .  the inclusion of an integrated AAA server F .  an external AAA-server requirement

A . Right-click and click the Diagnose option in the Connect to a network window. B . Set the security type value to No authentication in the wireless network properties dialog box. C . Click the Manually connect to a wireless network option in the Set up a connection or network window. D . In the Wireless Network properties dialog box， click the Connect even if the network is not broadcasting option. E . Configure the correct IP address， subnet mask， and default gateway for the target network in the wireless network connection properties dialog box.

Packet-switching wireless networks are preferable(41)when transmissions are(42)because of the way charges are(43)per packet. Circuit-switched networks are preferable for transferring large files or for other lengthy transmissions because customers are(44)for the(45)of time they use the net-work. A．to B．for C．than D．only

<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/89516ba86f46455345fbbdb75d510af3.jpg' /> A．A B．B C．C D．D E．E

A．real-time information B．delayed information