Interview Questions.

CCNA Interview Questions and Answers


CCNA Interview Questions and Answers

Q1. What is CCNA and CCNP in networking?


Ans: Cisco Certified Network Professional (CCNP) Certifications validate knowledge and abilities required to put in, configure, and troubleshoot converged nearby- and huge-areanetworks with 100 to 500 or greater quit-devices. One wishes a valid CCNAcertification to attain a CCNP certification.


Q2. What can you do with a CCNA?


Ans: Most Popular Job for Employees with a Cisco Certified Network Associate (CCNA) Certification Median Salary Charts

Network Engineer.

Network Administrator.

Sr. Network Engineer.

Information Technology (IT) Manager.

Systems Administrator.

Systems Engineer (Computer Networking / IT)

Information Technology (IT) Director.

Q3. Which layer of the OSI model is liable for reliable connections?

Ans: The Transport layer of the OSI model is accountable for dependable connections.


Q4. What is the difference between acknowledgments and handshaking?


Ans: Handshaking is used to barter the residences of a connection that is being hooked up. Acknowledgments are used to inform the sender that data has been successfully obtained with the aid of the vacation spot for the duration of the usage of a connection.


Q5. What does a CCNA do for you?


Ans: The 200-a hundred twenty five CCNA is the composite exam associated with the Cisco Certified Network Associate Routing & Switching certification. This exam exams a candidate's expertise and talents required to install, perform, and troubleshoot a small to medium size business enterprise department network.



Q6. How many VTP modes are there and what are they?


Ans: Three: Server, Client, and Transparent


Q7. How a good deal does it cost to get a CCNA?


Ans: In the event which you want to acquire two separate assessments for CCNA then you definitely best need to pay $125 for each check. The fee of CCNP Composite is $300 as properly. The pleasant factor about CCNA is there may be no discrimination in terms of the pricing for the cause that the fee all over the global is simply the same.


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Q8. What is CCNA and CCNP in networking?


Ans: Cisco Certified Network Professional (CCNP) Certifications validate knowledge and skills required to put in, configure, and troubleshoot converged local- and extensive-areanetworks with one hundred to 500 or greater cease-devices. One wishes a valid CCNAcertification to attain a CCNP certification.


Q9. What is the difference between TCP and UDP?


Ans: The primary distinction between TCP and UDP is that TCP is a connection orientated protocol and UDP is a connectionless protocol.


Q10. What is HSRP?


Ans: HSRP, or the Hot Standby Routing Protocol, is a Cisco proprietary protocol that brings routing capability to end gadgets that might in any other case not be able to taking advantage of redundant network connections. HSRP allows a pair of Cisco routers to paintings together to provide the arrival of a unmarried digital default-gateway to quit gadgets on a LAN segment.

Q11. What do You Understand through Routing?

Ans: Routing is the system of taking Packet from source to very last vacation spot. Router is the device which does routing, which is based totally on destination ip deal with. Router does this process on hop by way of hop foundation.

Q12. What is the distinction between IGRP and RIP?

Ans: While IGRP evaluates factors like reliability, bandwidth, hop be counted and MTU to deduce and provide the exceptional routing network, RIP completely is predicated at the hop numbers with a view to know which course can quality use for a network.

Q13. Describe the distinction among unicast, multicast, and broadcast traffic?


Ans: Unicast visitors flows from a single supply to a unmarried destination MAC cope with. Multicast traffic flows from a unmarried source MAC cope with to many destinations and uses a purposeful MAC deal with. Broadcast site visitors is from a single supply to all devices on the Ethernet section. This is specific through a vacation spot MAC deal with of all ones.


 Q14. What are the 4 distinct Ethernet encapsulation kinds?


Ans: From the Cisco IPX encapsulation command they're ARPA, NOVELL-ETHER, SAP and SNAP



Q15. Name three essential variations between LANs and WANs.

Ans: Three fundamental variations between nearby-area and extensive-place networks are:

LANs are constrained to a small geographic location, such as a unmarried building or small campus.

WANs cover a huge geographic vicinity, from citywide to worldwide.

LANs normally consist entirely of privately owned additives. Some components of a WAN, such as a packet switching network or factor-to-point serial links, are typically leased from a provider provider.

A LAN gives excessive bandwidth at a fairly cheap fee. The bandwidth throughout a WAN is appreciably more expensive.

Q16. What are the five layers of the TCP/IP protocol suite? What is the motive of each layer?

Ans: The 5 layers of the TCP/IP protocol suite are the subsequent:

Physical layer

Data link layer

Internet (or IP) layer

Host-to-host layer

Application layer

Q17. What is an deal with mask, and the way does it work?

Ans: An IP address masks identifies the network part of an IP address. Each one within the 32-bit mask marks the corresponding bit within the IP deal with as a network bit. A 0 in the masks marks the

Corresponding bit within the IP address as a host bit. A Boolean AND is accomplished in all 32 bits of the deal with and the masks; inside the end result, all network bits of the masks could be repeated, and all host bits will be modified to 0.

Q18. What is a subnet? Why are subnets used in IP environments?

Ans: A subnet is a sub grouping of a class A, B, or C IP cope with. Without subletting, the community part of a chief class A, B, or C IP deal with can only discover a single records hyperlink. Subnetting uses some of the host bits of a primary IP cope with as network bits, permitting the unmarried important deal with to be “Subdivided" into more than one community addresses.

Q19. What is a redirect?

Ans: A redirect is an IP router function. If a tool has sent a packet to the router and the router need to forward the packet to a next-hop router on the same facts hyperlink, the router will send a redirect to the originating tool. The redirect will tell the tool that it may reach the following-hop router directly.

Q20.  What is the critical distinction among TCP and UDP?

Ans: TCP, or Transmission Control Protocol, presents a connection-oriented provider over the connectionless internet layer. UDP, or User Datagram Service, affords a connectionless provider.

Q21. What mechanisms does TCP use to offer connection-orientated provider?

Ans: Correct sequencing is done with collection numbers. Reliability is achieved by using using test sums, acknowledgments, timers, and re-transmissions. Flow control is accomplished by windowing.

Q22. What are the three most important responsibilities of a obvious bridge?


Ans: Learning, Forwarding, Filtering