Cisco 200-125 Online Practice Questions and Exam Preparation

Cisco 200-125 Online Questions & Answers

• Question 1071:

  Drag and drop the MAC address types from the left onto the correct descriptions on the right?

  Select and Place:

  

  

• Question 1072:

  How is an EUI-64 format interface ID created from a 48-bit MAC address?

  A. by appending 0xFF to the MAC address
  B. by prefixing the MAC address with 0xFFEE
  C. by prefixing the MAC address with 0xFF and appending 0xFF to it
  D. by inserting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
  E. by prefixing the MAC address with 0xF and inserting 0xF after each of its first three bytes
  D. by inserting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address

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  The modified EUI-64 format interface identifier is derived from the 48-bit link-layer (MAC) address by inserting the hexadecimal number FFFE between the upper three bytes (OUI field) and the lower three bytes (serial number) of the link layer address.

• Question 1073:

  Which statement about RADIUS security is true?

  A. It supports EAP authentication for connecting to wireless networks.
  B. It provides encrypted multiprotocol support.
  C. Device-administration packets are encrypted in their entirety.
  D. It ensures that user activity is fully anonymous.
  A. It supports EAP authentication for connecting to wireless networks.

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  Explanation: RADIUS is an access server that uses AAA protocol. It is a system of distributed security that secures remote access to networks and network services against unauthorized access. RADIUS comprises three components:

  A protocol with a frame format that utilizes User Datagram Protocol (UDP)/IP.

  A server.

  A client.

  The server runs on a central computer typically at the customer's site, while the clients reside in the dial-up access servers and can be distributed throughout the network. Cisco has incorporated the RADIUS Client into Cisco IOS Software

  Release 11.1 and later and other device software.

  Client/Server ModelA network access server (NAS) operates as a client of RADIUS. The client is responsible for passing user information to designated RADIUS servers, and then acting on the response that is returned. RADIUS servers are

  responsible for receiving user connection requests, authenticating the user, and returning all configuration information necessary for the client to deliver service to the user. The RADIUS servers can act as proxy clients to other kinds of

  authentication servers. Network SecurityTransactions between the client and RADIUS server are authenticated through the use of a shared secret, which is never sent over the network. In addition, any user passwords are sent encrypted

  between the client and RADIUS server. This eliminates the possibility that someone snooping on an unsecured network could determine a user's password. Flexible Authentication MechanismsThe RADIUS server supports a variety of

  methods to authenticate a user. When it is provided with the user name and original password given by the user, it can support PPP, Password Authentication Protocol (PAP), or Challenge Handshake Authentication Protocol (CHAP), UNIX

  login, and other authentication mechanisms.

  RADIUS does not support these protocols:

  AppleTalk Remote Access (ARA) protocol

  NetBIOS Frame Protocol Control protocol

  Novell Asynchronous Services Interface (NASI)

  X.25 PAD connection

  TACACS+ offers multiprotocol support.

• Question 1074:

  which option is the correct CIDR notation for 192.168.0.0 subnet 255.255.255.252?

  A. /29
  B. /30
  C. /31
  D. /32
  B. /30

• Question 1075:

  If three devices are plugged into one port on a switch and two devices are plugged into a different port, how many collision domains are on the switch?

  A. 2
  B. 4
  C. 5
  D. 6
  A. 2

• Question 1076:

  What is the alternative notation for the IPv6 address B514:82C3:0000:0000:0029:EC7A:0000:EC72?

  A. B514 : 82C3 : 0029 : EC7A : EC72
  B. B514 : 82C3 :: 0029 : EC7A : EC72
  C. B514 : 82C3 : 0029 :: EC7A : 0000 : EC72
  D. B514 : 82C3 :: 0029 : EC7A : 0 : EC72
  D. B514 : 82C3 :: 0029 : EC7A : 0 : EC72

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  There are two ways that an IPv6 address can be additionally compressed: compressing leading zeros and substituting a group of consecutive zeros with a single double colon (::). Both of these can be used in any number of combinations to notate the same address. It is important to note that the double colon (::) can only be used once within a single IPv6 address notation. So, the extra 0's can only be compressed once.

• Question 1077:

  Which three are the possible trunking modes for a switch port? (Choose three.)

  A. forwarding
  B. desirable
  C. transparent
  D. Auto
  E. on
  F. off
  B. desirable
  D. Auto
  E. on

• Question 1078:

  Which command is used to know the duplex speed of serial link?

  A. show line
  B. show interface
  C. show protocol
  D. show run
  B. show interface

• Question 1079:

  Which identification number is valid for an extended ACL?

  A. 1
  B. 64
  C. 99
  D. 100
  E. 299
  F. 1099
  D. 100

• Question 1080:

  Drag and Drop.

  Select and Place: