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CCNP Interview Questions

CCNP job interview involves tricky and technical questions. Students just passed the certification are unaware of real industry techniques. Candidates do come to know about the real-industry problem solving techniques, but it takes time and experience. At initial stages, the questionnaire provided below will help to get success in interviews. Cracking the CCNP interview questions can lead to the gateway to success and fruitful fortune. To ensure success to every student in CCNP interviews, our Aptron's CCNP specialists, CCNP experts, and CCNP trainers have squeezed their quality experience, skills and understanding while drafting the CCNP interview questions and answers for freshers as well as for experienced candidates. This piece of write-up holds thorough answers covering basic and advanced CCNP interview questions.

ccnp interview questions

About CCNP

CCNP (Cisco Certified Network Professional) is a Cisco certification in networking from Cisco Systems. After completing the CCNP course training, participants can explore jobs availability in the industry. The prominent domains such as manufacturing, wholesale, retail, services, and IT, requires CCNP networking professionals to handle their networking requirements and data routing. CCNP certification is focuses on security, cloud, collaboration, security operations, design, data center technologies, industrial plants, service providers, and wireless.

CCNP Interview Questions And Answers

1. Describe why postal addresses and telephone numbers are routable.

A postal address has three components that can be used to deliver mail: state, city, and street. A phone number has an area code and exchange. At the core layer, mail can be delivered to the next post office based on only the state or city and state information. A phone number is delivered at the core layer based on the area code.

2. What is the purpose of a default route?

A default route is used if there is not a specific entry in the routing table for the destination.

3. Describe the difference between routing and switching.

Routing moves a letter or telephone call to the access layer (as in a street or telephone exchange). Switching makes the final delivery. A switching decision is made on the part of the address that is not used in routing (as in the street number or last four digits of a phone number).

4. What does the term information hiding mean in relation to route summarization?

At the core layer in the postal system, the only information that is needed to make a routing decision is the state or city/state information. The specific street names and street numbers are hidden, the core layer does not need this information. At the core layer in the telephone system, the area code is used to make a routing decision. The specific exchange or last four digits of the phone number are not needed, or hidden, from the core layer.

5. How does the use of a hierarchical routing structure (access, distribution, and core) enable a scalable delivery system?

If a delivery system is not divided into access, distribution, and core layers, every point in the system needs to maintain every possible destination address to make a delivery decision. The use of a layered system means each layer needs only the information necessary to deliver to the next layer, either above or below.

6. Why are multiple protocols used, such as a package, addressing, delivery, and transportation, instead of using one protocol defining everything?

Using multiple protocols is modular and allows changes to one protocol without affecting the others. For example, if the addressing protocol is dependent on the delivery protocol, changes to one would imply changes need to be made to the other.

7. Can you think of another familiar system that routes using a hierarchical delivery system?

The airport system. At the core routing level, there are major hub airports such as Denver, Chicago, New York, and Atlanta. The core airports are responsible for routing people and cargo to major geographical areas. Core airports connect with regional airports that serve a specific area; regional airports are at the distribution layer. Finally, to reach your final destination, you can take a bus, a cab, a train, or rent a car. This can be considered the access layer.

8. Explain how a letter from New York City to San Diego is routed using the address information.

The source address is not used unless the letter needs to be returned to the sender. Using the destination address, the access level post office in New York examines the state, city, and street information to determine if it is directly connected to the destination. If not, the letter is sent to the distribution layer post office using a default route. The distribution layer post office also examines the state, city, and street information to determine if it is directly connected to an access layer post office servicing the particular street. If it isn’t, the letter is routed to the core level using a default route. The core level post office examines the state name, and if the state name does not equal New York, the letter is delivered to the core post office for the state of California. The California core post office delivers the letter to the distribution post office that handles the city of San Diego. The San Diego distribution post office delivers the letter to the access post office that handles the destination street. Finally, the access level switch delivers the letter to the proper destination.

9. What are the access, distribution, and core components of a postal address?

The street name and number are the access layer components. The city name is the distribution layer component. The state name is the core layer component.

10. What are the access, distribution, and core components of a North American phone number?

The last four digits are the used at the access layer to identify a particular telephone. The next three numbers are used at the distribution layer to identify an exchange that services several phone numbers. The area code is used at the core level for routing between different regions.

This is a speed drill. Using only your head, convert the following binary numbers to decimal. 11100000

11111100
10000000
11110000
00111111
224, 252, 128, 240, and 63 (64 – 1)

11. Explain the purpose of OSPF virtual link?

The virtual link is used to connect a non-zero area to the backbone, in case the non-zero area gets disconnected from the backbone. It is also used if the backbone or area 0 becomes discontiguous.

12. How many OSPF databases are on an OSPF router?

On an OSPF router, the number of OSPF databases are equal to the number of OSPF area configured.

13. Can you explain the difference between OSPF and IS-IS backbone?

  • OSPF : The OSPF has area 0 or backbone area.

All the non-zero areas must be connected through a virtual link or a router.

  • IS-IS :It has a backbone area which is made up of a contiguous chain of Level 2 capable routers.

14. Explain the purpose and scope of WEIGHT attribute?

When there is more than one route to the same IP prefix for any router, the best path would be the one with the highest WEIGHT value.It has only the local significance and is not advertised to the BGP peers.

15. What is the purpose and scope of LOCAL_PREF attribute?

When there is more than one route to the same IP prefix for any router, the best path would be with the highest LOCAL_PREF.It is advertised throughout the autonomous system.

16. What is Synchronization?

It is a property of IBGP.The IGBP router will not accept a prefix received from an IGBP neighbor if the prefix is not already in the IP routing table.

17. Can you explain the function of rendezvous point?

A Rendezvous point is a focal point for the multicast traffic. The traffic is forwarded to the rendezvous point from multi-cast sources then the rendezvous point forwards traffic to the multicast receivers.

18. Distinguish between routing and switching?

  • Routing: It moves a letter or telephone call to the access layer.
  • Switching: The final delivery is made by switching and the switching decision is made on the part of the address that isn’t used in routing.

19. In route summarization what does the term hiding information mean?

  • Postal system :In the postal system, the core layer is only information which is required to make a routing decision in the city or state information.

We can see some specific street numbers and names hidden because the core layer doesn’t require them.

  • Telephone system :In a telephone system, at the core layer, the area code is used to make the routing decision.The specific last four digit of the phone numbers are hidden because the core layer doesn’t require them.

20. What Is The Difference Between Classless And Classfull Routing?

Classfull routing don not advertise subnet mask information along with the network prefix while classless routing do.

21. What Is The Main Purpose Of Areas In Ospfv2?

Routers networks are divided in to areas which are they connected to backbone area0. The areas help you to give performance and easy to handle big network

22. What Will Be The Broadcast Ip Of The 202.4.81.96/27?

202.4.81.127

23. In Ospfv2, What Is The Purpose Virtual Link?

The main purpose of virtual link is to connect nonzero area with backbone area.

24. What Is A Load Balancer?

It is a network device which is used to balance the load in on available nodes.

25. What Is Voice Circuit?

It is specially used for voip only because it have ports enable on it which allow voip traffic.

26. At Which Layer Hub Work?

Hub works at physical layer.

27. Home Many Types Of Rip Messages?

There are two type of RIP messages, these are request and respond.

28. What are triggered updates?

When a router notices that a directly connected subnet has changed state, it immediately sends another routing update out its other interfaces rather than waiting for the routing update timer to expire. Triggered updates are also known as Flash updates.

29. How do you display the contents of a Cisco IP routing table?

The show ip route command displays the Cisco routing table's contents.

30. What is Interior Gateway Routing Protocol (IGRP)?

IGRP is a Cisco proprietary distance vector routing protocol. IGRP has a default hop count of 100 hops, with a maximum hop count of 255. IGRP uses bandwidth and line delay as its default metric, but it can also use reliability, load, and MTU.

31. What is multicast address for EIGRP and OSPF hello packets:

EIGRP – 224.0.0.10

OSPF – for all the routers – 224.0.0.5

OSPF – initial multicast – only for DR and BDR – 224.0.0.6

32. What is type-1 and type-2 LSAs in OSPF?

  1. Type-1 LSAs are router LSAs and are generated by each router for the area to which the router belongs.
  2. Type-2 LSAs are network LSAs and are generated by the DR and BDR.

33. What does the TTL field of an IP packet header do?

The TTL field indicates the maximum time that a packet can be on the network. Each router that processes this packet decrements the TTL value by 1. If the value reaches zero, the packet is discarded from the network. The purpose of this field is to eliminate the possibility of a packet endlessly traversing the network.

34. What is the difference between an E1 and E2 OSPF route?

An E1 route contains the OSPF cost to reach the ASBR plus the cost from the ASBR to the external route. An E2 route contains only the cost from the ASBR to the external route.

35. What is route poisoning?

With route poisoning, when a distance vector routing protocol notices that a route is no longer valid, the route is advertised with an infinite metric, signifying that the route is bad. In RIP, a metric of 16 is used to signify infinity. Route poisoning is used with holddowns.

36. What is Summarization?

Summarization is the process of combining two or more smaller networks into one large network.

There are two types of summarization

  1. Auto Summary—done by router
  2. Manual summary— done by network administrator

37. What is subnetting?

Subnetting is the process of dividing one large network into smaller smaller networks.

There are two types of subnetting methods available

  1. FLSM: Dividing one large network into subnetworks
  2. VLSM: Dividing subnetted networks into subne

38. What is HSRP?

HSRP, or the Hot Standby Routing Protocol, is a Cisco proprietary protocol that brings routing functionality to end devices that would otherwise not be capable of taking advantage of redundant network connections. HSRP enables a pair of Cisco routers to work together to present the appearance of a single virtual default-gateway to end devices on a LAN segment.

39. How does the use of a hierarchical routing structure (access, distribution, and core) enable a scalable delivery system?

If a delivery system is not divided into access, distribution, and core layers, every point in the system needs to maintain every possible destination address to make a delivery decision. The use of a layered system means each layer needs only the information necessary to deliver to the next layer, either above or below.

40. What does the term information hiding mean in relation to route summarization?

At the core layer in the postal system, the only information that is needed to make a routing decision is the state or city/state information. The specific street names and street numbers are hidden, the core layer does not need this information. At the core layer in the telephone system, the area code is used to make a routing decision. The specific exchange or last four digits of the phone number are not needed, or hidden, from the core layer.

41. Describe the difference between routing and switching.

Routing moves a letter or telephone call to the access layer (as in a street or telephone exchange). Switching makes the final delivery. A switching decision is made on the part of the address that is not used in routing (as in the street number or last four digits of a phone number).

42. What is the purpose of a default route?

A default route is used if there is not a specific entry in the routing table for the destination.

43. Describe why postal addresses and telephone numbers are routable.

A postal address has three components that can be used to deliver mail: state, city, and street. A phone number has an area code and exchange. At the core layer, mail can be delivered to the next post office based on only the state or city and state information. A phone number is delivered at the core layer based on the area code.

44. Convert 10100010111101011001110110001011 2 to hexadecimal.

A2F59D8B

45. Convert FACE1234 16 to dotted decimal.

FA 16 = 250 10, CE16 = 20610, 1216 = 18 10, and 34 16 = 52 10

FACE1234 16 = 250.206.18.52 dotted decimal

Career scopes and salary scale

Candidates looking for job opportunities in CCNP field, would be amazed to see the ocean of opportunities available in the particular domain. Software development companies, fashion, designing, hospitality, pharmaceutical, engineering, etc are the sectors who require skilled CCNP professionals.

The average salary of CCNP candidate is 30, 000 dollars per annum. As time and experience increases, your salary also gets double. If you are one, then go through the questionnaire to find your best job and career ahead. Therefore, when it is about career scope in the field, it is at brighter side for the candidates.

Conclusion

This article ‘CCNP interview questions’ has professionally answered every advanced CCNP interview questions. Also, it draw near in CCNP interview questions for experienced is being projected by our trainers and team of consultants. They have put their hard efforts and top of the acquaintance to aid candidates in getting answers to all doubts and not clear perceptions. Even then, if learners still require more detailing about CCNP, they may drop in a message to our experts related to CCNP interview questions for experienced professionals. Our trainers would be happy to help and resolve all your CCNP programming issues of the students. Also, please provide your feedback on the comment section so that article can become a helpful guide to many students. Join CCNP Training in Noida, CCNP Training in Delhi, CCNP Training in Gurgaon

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