CCNA INTERVIEW Q&A
Q. What is a router?
A. A router is a device that connects more than one physical network, or segments of a network, using IP routing software. As packets reach the router, the router reads them and forwards them to their destination.
Q. Discuss wireless networking.
A. This is a network configured to use communication techniques such as infrared, cellular, or microwave, so that cable connections are not required.
Q. Discuss WAN (wide area network).
A. A WAN is extended over longer distances that a LAN (local area network). It can range from a few miles to across the world. TCP/IP is the primary WAN protocol and was developed to provide reliable, secure data transmissions over long distances.
Q. What is OSPF?
A. Open Shortest Path First is a routing protocol that supports the concept of a core area to which everything attaches.
Q. What is BGP?
A. Border Gateway Protocol is used for routing between networks on the Internet core, and it supports many advanced routing features.
Q. What is an autonomous system?
A. An autonomous system is a community of interest. Used in conjunction with routing protocols, it breaks up parts of the network into manageable chunks.
Q. What is dial on demand?
A. Dial on demand is a technology that only activates network connection when “interesting” packets are to be sent across the infrastructure.
Q. What mask would you use to supernet two class C addresses?
A. The subnet would be 255.255.254.0.
Q. What is VLANing?
A. Virtual LAN is used on large LANs to break up the network into smaller broadcast domains. This creates communities of interest. These communities can be based around organizational structures.