CISCO Certification problems
- 1. A router has learned three possible routes that could be used to reach a destination network. One route is from EIGRP and has a composite metric of 20684570. Another route is from OSPF with a metric of 852. The last is from RIPv2 and has a metric of 4. Which route or routes will the router install in the routing table? A. the OSPF route B. the EIGRP route C. the RIPv2 route D. all three routes E. the OSPF and RIPv2 routes Discuss
Correct Answer: : B Explanation : This is one of those tricky questions just to test your knowledge of routing protocols and their administrative distance Let?s look at the AD of popular routing protocols below: Routing Protocol (Source) AdministrativeDistance(AD) Directly connected 0 Static Route 1 EIGRP 90 Summary Route(EIGRP) 5 OSPF 110 RIP 120 Fom the above table, you can see that EIGRP has the lowest AD from all of the above mentioned routing protocols So, the router will choose to use the routing protocol which has lowest Administrative Distance which in this case is B EIGRP
- 2. What layer in the TCP/IP stack is equivalent to the Transport layer of the OSI model?
Options- A. Application
- B. Host-to-Host
- C. Internet
- D. Network Access Discuss
Correct Answer: Host-to-Host
Explanation:
The four layers of the TCP/IP stack (also called the DoD model) are Application/process, Host-to-Host, Internet, and Network Access. The Host-to-Host layer is equivalent to the Transport layer of the OSI model.
- 3. An administrator issues the command "ping 127.0.0.1" from the command line prompt on a PC host named PC1. If an ICMP reply is received, what does this confirm? A. The PC host PC1 has connectivity with a local host B. The PC host PC1 has connectivity with a Layer 3 device C. The PC host PC1 has a default gateway correctly configured D. The PC host PC1 has connectivity up to Layer 5 of the OSI model E. The PC host PC1 has the TCP/IP protocol stack correctly installed Discuss
Correct Answer: : E
- 4. Which of the following is an industry-wide standards suite of protocols and algorithms that allows for secure data transmission over an IP-based network that functions at the layer3 Network layer of the OSI model?
Options- A. HDLC
- B. xDSL
- C. VPN
- D. IPSec Discuss
Correct Answer: IPSec
Explanation:
IPSec is an industry-wide standard suite of protocols and algorithms that allows for secure data transmission over an IP-based network that functions at the layer3 Network layer of the OSI model.
- 5. By default , what type of trust are all Windows 2000 trust relationships within a domain tree or forest?
Options- A. Explicit trust
- B. One-way trust
- C. Transitive trust
- D. Non-transitive trust Discuss
Correct Answer: Transitive trust
Explanation:
By default, all Windows 2000 trusts within a domain tree or forest are transitive trusts.
- 6. Why is BGP a better choice for Internet routing than the IGPs? Discuss
Correct Answer: RIP version 1 and IGRP are classful protocols and do not advertise subnet mask information RIP version 2 has a limited network diameter of 15 hops EIGRP, OSPF, and IS-IS use computational intensive algorithms for determining a shortest path BGP relies on simple techniques for best path selection and loop detection, and can handle the number of network prefixes required for Internet routing
- 7. What is the purpose of flow control?
Options- A. To ensure that data is retransmitted if an acknowledgment is not received
- B. To reassemble segments in the correct order at the destination device
- C. To provide a means for the receiver to govern the amount of data sent by the sender
- D. To regulate the size of each segment Discuss
Correct Answer: To provide a means for the receiver to govern the amount of data sent by the sender
Explanation:
Flow control allows the receiving device to control the transmitter so the receiving device's buffer does not overflow.
- 8. Convert the following from binary format to decimal IP address. 11001100.00110011.10101010.01010101 Discuss
Correct Answer: Answer
- 9. A default Frame Relay WAN is classified as what type of physicalnetwork? A: broadcast point-to-multi point B: broadcast multi-access C: non broadcast multi-access D: non broadcast multi-point Discuss
Correct Answer: : C Explanation: FrameRelay, ATM, and X25 are non-broadcast multiple access (NBMA) networks NBMA networks allow only data transfer from one computer to another over a VC or across a switching device NBMA networks do not support multicast or broadcast traffic FrameRelay, ATM, and X25 are non-broadcast multiple access (NBMA) networks NBMA networks allow only data transfer from one computer to another over a VC or across a switching device NBMA networks do not support multicast or broadcast traffic - See more at: https://wwworbitco-ccna-pastquestionscom/CCNA-Past-Questions%3A-WANphp#sthashhb05ZKYsdpuf
- 10. 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
Correct Answer: : A , D Explanation: An IPv6 Unicast address identifies a single network interface The Internet Protocol delivers packets sent to a unicast address to that specific interface
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