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- Question
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
- Correct Answer
- Host-to-Host
ExplanationThe 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.
- 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
- 2. Which layer is responsible for keeping the data from different applications seperate on the network? Discuss
- 3. Routers operate at layer _____. LAN switches operate at layer ______. Ethernet hubs operate at layer _____. Word processing operates at layer _______.
Options- A. 3, 3, 1, 7
- B. 3, 2, 1, none
- C. 3, 2, 1, 7
- D. 3, 3, 2, none Discuss
- 4. What is the first thing that BGP checks to determine if a prefix is accessible? Discuss
- 5. 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 Discuss
- 6. 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
- 7. 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
- 8. 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
- 9. Why is BGP a better choice for Internet routing than the IGPs? Discuss
- 10. 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
CISCO Certification problems
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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
Correct Answer: The session layer creates sessions between different host's applications
Correct Answer: 3, 2, 1, none
Explanation:
Routers operate at layer 3. LAN switches operate at layer 2. Ethernet hubs operate at layer 1. Word processing applications communicate to the Application layer interface, but do not operate at layer 7, so the answer would be none.
Correct Answer: BGP checks the NEXT_HOP attribute to determine if the NEXT_HOP is accessible or in the IP routing table
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
Correct Answer: : E
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.
Correct Answer: Transitive trust
Explanation:
By default, all Windows 2000 trusts within a domain tree or forest are transitive trusts.
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
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.
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