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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
ExplanationWhen trying to find the best answer to an access-list question, always check the access-list number 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 an upper-layer protocol, you must use either tcp or udp in the protocol field. If it says ip in the protocol field, you cannot filter to an upper-layer protocol. SMTP uses TCP. - 1. What PPP protocol provides dynamic addressing, authentication, and multilink?
Options- A. NCP
- B. HDLC
- C. LCP
- D. X.25 Discuss
- 2. What does the passive command provide to dynamic routing protocols?
Options- A. Stops an interface from sending or receiving periodic dynamic updates.
- B. Stops an interface from sending periodic dynamic updates but not from receiving updates.
- C. Stops the router from receiving any dynamic updates.
- D. Stops the router from sending any dynamic updates. Discuss
- 3. Which protocol does DHCP use at the Transport layer?
Options- A. IP
- B. TCP
- C. UDP
- D. ARP Discuss
- 4. Which command is used to upgrade an IOS on a Cisco router?
Options- A. copy tftp run
- B. copy tftp start
- C. config net
- D. copy tftp flash Discuss
- 5. What does the command routerA(config)#line cons 0 allow you to perform next?
Options- A. Set the Telnet password.
- B. Shut down the router.
- C. Set your console password.
- D. Disable console connections. Discuss
- 6. To back up an IOS, what command will you use?
Options- A. backup IOS disk
- B. copy ios tftp
- C. copy tftp flash
- D. copy flash tftp Discuss
- 7. In which of the following technologies is the term HFC used?
Options- A. DSL
- B. PPPoE
- C. Frame Relay
- D. Dedicated T1 Discuss
- 8. Which of the following are layers in the TCP/IP model?
- Application
- Session
- Transport
- Internet
- Data Link
- Physical
Options- A. 1 and 2
- B. 1, 3 and 4
- C. 2, 3 and 5
- D. 3, 4 and 5 Discuss
- 9. Which of the following is private IP address?
Options- A. 12.0.0.1
- B. 168.172.19.39
- C. 172.15.14.36
- D. 192.168.24.43 Discuss
- 10. Which statements are true regarding ICMP packets?
- They acknowledge receipt of a TCP segment.
- They guarantee datagram delivery.
- They can provide hosts with information about network problems.
- They are encapsulated within IP datagrams.
Options- A. 1 only
- B. 2 and 3
- C. 3 and 4
- D. 2, 3 and 4 Discuss
More questions
Correct Answer: LCP
Explanation:
Link Control Protocol in the PPP stack provides dynamic addressing, authentication, and multilink.
Correct Answer: Stops an interface from sending periodic dynamic updates but not from receiving updates.
Explanation:
The
passive command, short for passive-interface, stops regular updates from being sent out an interface. However, the interface can still receive updates.
Correct Answer: UDP
Explanation:
User Datagram Protocol is a connection network service at the Transport layer, and DHCP uses this connectionless service.
Correct Answer: copy tftp flash
Explanation:
The
copy tftp flash command places a new file in flash memory, which is the default location for the Cisco IOS in Cisco routers.
Correct Answer: Set your console password.
Explanation:
The command
line console 0 places you at a prompt where you can then set your console user-mode password.
Correct Answer: copy flash tftp
Explanation:
The command
copy flash tftp will prompt you to back up an existing IOS in flash to a TFTP host.
Correct Answer: Dedicated T1
Explanation:
In a modern network, hybrid fibre-coaxial (HFC) is a telecommunications industry term for a network that incorporates both optical fiber and coaxial cable to create a broadband network.
Correct Answer: 1, 3 and 4
Explanation:
This seems like a hard question at first because it doesn't make sense. The listed answers are from the OSI model and the question asked about the TCP/IP protocol stack (DoD model). However, let's just look for what is wrong. First, the Session layer is not in the TCP/IP model; neither are the Data Link and Physical layers. This leaves us with the Transport layer (Host-to-Host in the DoD model), Internet layer (Network layer in the OSI), and Application layer (Application/Process in the DoD).
Correct Answer: 192.168.24.43
Explanation:
Class A private address range is 10.0.0.0 through 10.255.255.255. Class B private address range is 172.16.0.0 through 172.31.255.255, and Class C private address range is 192.168.0.0 through 192.168.255.255.
Correct Answer: 3 and 4
Explanation:
Internet Control Message Protocol (ICMP) is used to send error messages through the network, but they do not work alone. Every segment or ICMP payload must be encapsulated within an IP datagram (or packet).
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