Cisco 200-355 Online Practice Questions and Exam Preparation

Cisco 200-355 Online Questions & Answers

• Question 521:

  Which element is most useful to gather data from using the client troubleshooting tool?

  A. MAC address of the AP
  B. SSID
  C. MAC address of the client
  D. IP address of the client
  C. MAC address of the client

• Question 522:

  A client is deploying lightweight APs. Those with LAN connections to the controller would be considered what mode of deployment, while access points deployed across a higher latency connection are deployed in what mode?

  A. HREAP; Bridge
  B. Local; Bridge
  C. HREAP; Flex Connect
  D. Local; Flex Connect
  D. Local; Flex Connect

• Question 523:

  Which encryption algorithm does WPA use?

  A. RC4
  B. DES
  C. AES
  D. DH5
  A. RC4

  ---

  The RC4 Encryption Algorithm, developed by Ronald Rivest of RSA, is a shared key stream cipher algorithm requiring a secure exchange of a shared key. The symmetric key algorithm is used identically for encryption and decryption such that the data stream is simply XORed with the generated key sequence. The algorithm is serial as it requires successive exchanges of state entries based on the key sequence. Hence implementations can be very computationally intensive. The RC4 encryption algorithm is used by standards such as IEEE 802.11 within WEP (Wireless Encryption Protocol) using 40 and 128-bit keys. Published procedures exist for cracking the security measures as implemented in WEP. http://www.vocal.com/cryptography/rc4-encryption-algoritm/

• Question 524:

  During which type of survey does the surveyor interact with the infrastructure?

  A. planning
  B. active
  C. passive
  D. predictive
  B. active

• Question 525:

  Which way to upgrade the image on FlexConnect access points is the most efficient?

  A. Unified access points operating in FlexConnect mode download the new software image from the controller designated as "masters".
  B. Unified access points operating in FlexConnect mode download the new software image from the controller designated as "secondary".
  C. Unified access points operating in FlexConnect mode download the new software image from access points designated as "slaves".
  D. Unified access points operating in FlexConnect mode download the new software image from access points designated as "masters".
  D. Unified access points operating in FlexConnect mode download the new software image from access points designated as "masters".

  ---

  Reference: https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-1/configuration-guide/b_cg81/configuring_flexconnect_ap_upgrades_for_flexconnect_aps.html

• Question 526:

  The corporate network locates all RADIUS servers at the centralized data center for authentication. The remote offices use access points operating in H-REAP mode using v5.0 code with various local and central switch WLANs. When a remote office has lost connectivity to the main corporate network due to a WAN outage, which two statements correctly describe the status of that remote office when H-REAP access points are operating in standalone mode? (Choose two.)

  A. All Cisco APs with 16 MB of RAM or more can operate as standalone H-REAP.
  B. All clients will continue association until the respective authentication timers expire.
  C. If configured, clients using WPA or WPA2 with PSK and locally switched WLANs will continue to operate.
  D. If configured, locally switched WLANs will continue operation using the backup RADIUS server feature.
  E. If configured, locally switched WLANs will continue operation using Local-EAP for EAP-LEAP and EAP-FAST for up to twenty users.
  F. If configured, locally switched WLANs will continue operation using Local-EAP for EAP-LEAP, EAP-FAST, EAP-TLS, and EAP-PEAP for up to twenty users.
  C. If configured, clients using WPA or WPA2 with PSK and locally switched WLANs will continue to operate.
  E. If configured, locally switched WLANs will continue operation using Local-EAP for EAP-LEAP and EAP-FAST for up to twenty users.

• Question 527:

  When using a Split MAC architecture, how many CAPWAP data tunnels will be built to an AP with four SSIDs across two VLANs?

  A. 1
  B. 2
  C. 3
  D. 4
  A. 1

• Question 528:

  Which statement about the impact of configuring a single SSID to support TKIP and AES encryption simultaneously is true?

  A. The overhead associated with supporting both encryption methods significantly degrades client throughput.
  B. Some wireless client drivers might not handle complex SSID settings and may be unable to associate to the WLAN.
  C. This configuration is unsupported and the Cisco Wireless Control System generates alarms continuously until the configuration is corrected.
  D. This configuration is common for migrating from WPA to WPA2. No problem is associated with using this configuration.
  B. Some wireless client drivers might not handle complex SSID settings and may be unable to associate to the WLAN.

  ---

  AES encryption uses hardware so there is almost no overhead when using it. TKIP is based on software. So when we support both TKIP and AES the client throughput will not significantly degrade -> A is not correct. When choosing both AES

  and TKIP, the router will support both encryption algorithms. Because not all wireless NICs support AES, some only support TKIP, so this option is probably the best choice -> B is not correct.

  As the picture below, Cisco Wireless Control System does support both simultaneously -> C is not correct.

• Question 529:

  Which menu path on an Android phone displays currently connected wireless network information such as link speed, IP address, and connectivity status?

  A. Settings > More > connected SSID
  B. Settings > About phone > Status
  C. Settings > Wi-Fi > connected SSID
  D. Settings > More > Wi-Fi
  C. Settings > Wi-Fi > connected SSID

• Question 530:

  Refer to the exhibit.

  

  A network engineer needs the far end of a wireless bridge to receive at -45dBM. Based on the diagram, what value in dBm must the transmitter use to send to achieve the desired result?

  A. -118
  B. -28
  C. -20
  D. 20
  E. 28
  F. 118
  E. 28