CCNA Interview Question Part-1

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CCNA CCNP Interview Questions:

• Which layer of the OSI model is responsible for reliable connections?

Answer: The Transport layer of the OSI model is responsible for reliable connections.

• What is the difference between acknowledgments and handshaking?

Answer: Handshaking is used to negotiate the properties of a connection that is being established. Acknowledgments are used to tell the sender that data has been successfully received by the destination during the use of a connection.

•  How many VTP modes are there and what are they?

Answer: Three: Server, Client, and Transparent

• What are the two types of Trunk encapsulation protocols?

Answer: IEEE 802.1Q and Cisco’s ISL

• What are the four primary no routable protocols?

Answer: SNA, NetBIOS, DEC LAT, DEC MOP

• What is the difference between TCP and UDP?

Answer: The primary difference between TCP and UDP is that TCP is a connection oriented protocol and UDP is a connection less protocol.

• What is HSRP?

Answer: 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.

• What is the difference between a Public IP address and a Private IP address?

Answer: Public address space is a unique address that is assigned to a company. Private address space is not recognized by the Internet and can be used by anyone within their private network.

•  What does AAA stand for?

Answer: Authentication, authorization, and accounting

•  The H.323 protocol is used for what?

Answer: H.323 is used for multi service (multimedia) applications, usually in a Voice Over IP environment.

•  What type of routing protocol maintains neighbors?

Answer- Link State

• what is the range of values for administrative distance?

Answer: 0-255

•  Describe the difference between uni cast, multi cast, and broadcast traffic?

Answer: Unicast traffic flows from a single source to a single destination MAC address. Multicast traffic flows from a single source MAC address to many destinations and uses a functional MAC address. Broadcast traffic is from a single source to all devices on the Ethernet segment. This is specified by a destination MAC address of all ones.

For More visit the below posts    
CCNA interview Questions part-2
CCNA interview Questions part-3