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  • Question
  • What command will permit SMTP mail to only host 1.1.1.1?


  • Options
  • A. access-list 10 permit smtp host 1.1.1.1
  • B. access-list 110 permit ip smtp host 1.1.1.1
  • C. access-list 10 permit tcp any host 1.1.1.1 eq smtp
  • D. access-list 110 permit tcp any host 1.1.1.1 eq smtp

  • Correct Answer
  • access-list 110 permit tcp any host 1.1.1.1 eq smtp 

    Explanation

    when trying to find the best answer to an access - list question, always check the access - list bnumber and then the protocol. When filtering to an upper - layer protocol, you must use an extended list, numbers 100 - 199 and 2000 - 2699. Also, when you filter to the port of an upper - layer protocol, you must use either tcp or udp in the ACL protocol field. If it says ip in the protocol field, you cannot filoter on the port number of an upper - layer protocol. SMTP uses TCP


  • 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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