CISCO Certification problems
- 1. You want to implement a mechanism that automates the IP configuration, including IP address, subnet mask, default gateway, and DNS information. Which protocol will you use to accomplish this?
Options- A. SMTP
- B. SNMP
- C. DHCP
- D. ARP Discuss
Correct Answer: DHCP
Explanation:
Dynamic Host Configuration Protocol (DHCP) is used to provide IP information to hosts on your network. DHCP can provide a lot of information, but the most common is Ip address, subnet mask, default gateway, and DNS information.
- 2. What does the command confreg 0x2142 provide?
Options- A. It is used to restart the router
- B. It is used to bypass the configuration in NVRAM
- C. It is used to enter ROM monitor mode
- D. It is used to view the lost password Discuss
Correct Answer: It is used to bypass the configuration in NVRAM
Explanation:
The default configuration setting is 0x2102, which tells the router to load the IOS from flash and the configuration from NVRAM. 0x2142 tells the router to bypass the configuration in NVRAM so that you can perform password recovery.
- 3. If you want to disable STP on a port connected to a server, which command would you use?
Options- A. disable spanning-tree
- B. spanning-tree off
- C. spanning-tree security
- D. spanning-tree portfast Discuss
Correct Answer: spanning-tree portfast
Explanation:
If you have a server or other devices connected into your switch that you're totally sure won't create a switching loop if STP is disabled, you can use something called portfast on these ports. Using it means the port won't spend the usual 50 seconds to come up while STP is converging.
- 4. Which of the following describes the creation of private networks across the Internet, enabling privacy and tunneling of non-TCP/IP protocols?
Options- A. HDLC
- B. Cable
- C. VPN
- D. IPSec Discuss
Correct Answer: VPN
Explanation:
A VPN allows or describes the creation of private networks across the Internet, enabling privacy and tunneling of non-TCP/IP protocols. A VPN can be set up across any type of link.
- 5. Explain the difference between the forwarding of a unicast IP packet and the forwarding of a multicast IP packet. Discuss
Correct Answer: Unicast IP packets are forwarded based on the destination IP address Multicast packets are forward based on the source IP address If a multicast packet is received on the interface used to send a unicast packet back to the source, the multicast packet is forwarded to multicast neighbors If the multicast packet is received on an interface that would not be used to send a unicast IP packet back to the source, the packet is discarded
- 6. What are the purposes of areas in an OSPF network? Discuss
Correct Answer: Areas allow the design of a hierarchical network Routes can be summarized or blocked in an area to reduce the amount of routing information on internal OSPF routers
- 7. What are the six OSPF route types? Discuss
Correct Answer: Intra-area, inter area, El, E2, Nl, and N2
- 8. What port number is used for DHCP?
Options- A. 67
- B. 68
- C. 69
- D. Both A and B Discuss
Correct Answer: Both A and B
- 9. What does a firewall?
Options- A. Examines packets and decides which ones should be allowed to pass from one network to another.
- B. Maintains a table which maps the IP addresses of two network so that packets can be redirected between the networks.
- C. Compares packets to virus signatures so that packets which are know to be dangerous can be identified and stopped.
- D. Prevents viruses from moving any further through a network Discuss
Correct Answer: Examines packets and decides which ones should be allowed to pass from one network to another.
- 10. Which of the following devices do not operate at all levels of the OSI model?
Options- A. Network management stations (NMSs)
- B. Routers
- C. Web and application servers
- D. Network hosts Discuss
Correct Answer: Routers
Explanation:
Routersoperate no higher than layer 3 of the OSI model.
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