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  • Question
  • If you wanted to deny all Telnet connections to only network 192.168.10.0, which command could you use?


  • Options
  • A. access-list 100 deny tcp 192.168.10.0 255.255.255.0 eq telnet
  • B. access-list 100 deny tcp 192.168.10.0 0.255.255.255 eq telnet
  • C. access - list 100 deny tcp any 192.168.10.0 0.0.0.255 eq 23
  • D. access - list 100 deny 192.168.10.0 0.0.0.255 any eq 23

  • Correct Answer
  • access - list 100 deny tcp any 192.168.10.0 0.0.0.255 eq 23 

    Explanation

    The extended access list ranges are 100 - 199 and 2000 - 2699, so the access-list number of 100 is valid. Telnet uses TCP, so the protocol TCP is valid. Now you just need to look for the source and destination address. only the third option has the correct sequence of parameters. Option B may work, but the question specifically states "only" to network 192.168.10.0, and the wildcard in option B is too broad.


  • More questions

    • 1. Which two descriptions are correct about characteristics of IPv6 unicast addressing? (Choose two) A. Global addresses start with 2000::/3. B. Link-local addresses start with FF00::/10. C. Link-local addresses start with FE00:/12. D. There is only one loopback address and it is ::1.
    • Discuss
    • 2. What are the six OSPF route types?
    • Discuss
    • 3. How many non- overlapping channels are available with 802.11b?

    • Options
    • A. 3
    • B. 12
    • C. 23
    • D. 40
    • Discuss
    • 4. Which IEEE committee has been sanctioned by WAP and is called WPA2?
    • Discuss
    • 5. When a station sends a transmission to the MAC address ff : ff : ff : ff : ff : ff, what type of transmission is it?

    • Options
    • A. Unicast
    • B. Multicast
    • C. Anycast
    • D. Broadcast
    • Discuss
    • 6. In the operation of CSMA/CD, which host(s) have priority after the expiration of the backoff algorithm?

    • Options
    • A. All hosts have equal priority
    • B. The two hosts that caused the collision will have equal priority
    • C. The host that sent the jam signal after the collision
    • D. The host with the highest MAC address
    • Discuss
    • 7. What is the Classs A Private IP address space?
    • Discuss
    • 8. What is the Class C private IP address space?
    • Discuss
    • 9. To use VLSM, what capability must the routing protocols in use possess?

    • Options
    • A. Support for multicast
    • B. Multi-protocol support
    • C. Transmission of subnet mask information
    • D. Support for unequal load balancing
    • Discuss
    • 10. If you wanted administrators to see a message when logging into the router, which command would you use?

    • Options
    • A. message banner motd
    • B. banner message motd
    • C. banner motd
    • D. message motd
    • Discuss


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