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Category: CCNA Interview Questions
TCP Interview Questions & Answers
What is TCP? Transmission Control Protocol is a connection-oriented protocol. This means that before any data transfer can take place, Certain Parameters has to be negotiated in order to establish the connection What is TCP Three Way Handshake process? TCP Three Way Handshake process is used for a reliable connection. In this process, the transmitting network device first establishes a connection-oriented (reliable) session with its peer system which is called three-way handshake. Data is then transferred. When the Data transfer is finished, connection is terminated and virtual circuit is teared down. What is window size in TCP three Read More …
OSI Model Interview Questions for CCNA
A Server at a company called NETWORKWALKS is using TCP/IP protocol to connect to the Network & is running multiple applications. At which layer of OSI Model is this Server operating? This Server is operating at Application Layer of OSI Model What are LLC and MAC sublayers? What are their functions? LLC & MAC Sublayers are the two sub-divisions of Data link layer (Layer 2) of the OSI model. Media Access Control (MAC) sublayer controls device interaction Logical Link Control (LLC) sublayer controls LLC sublayer deals with addressing and multiplexing Which Layer is used to deal with mechanical Read More …
BGP Interview Questions & Answers
BGP is which type of Routing Protocol? BGP is a Path Vector Routing Protocol. It falls under the category of EGP (Exterior Gateway Protocol) Which algorithm is used by BGP for best path selection? BGP uses Composite Metric for best path selection and install the best routes into the routing table What are BGP Path attributes? BGP uses multiple attributes or metrics for best path selection which are Weight (cisco), LOCAL_PREF, aggregate, as_path, origin, MED, neighbor type (ebgp > ibgp), igp metric (next_hop), route age, router ID (originator ID), Neighbor IP How many neighbor states are there Read More …
EIGRP Interview Questions & Answers
What is EIGRP? EIGRP is a Routing Protocol used for IP Networks. It is classless, Distance Vector & Hybrid type of Routing protocol. It was released in 1993. Is EIGRP a Cisco proprietary protocol or open source protocol? EIGRP is partially open source routing protocol. It was a Cisco proprietary protocol till 2013. Then Cisco submitted a portion of EIGRP to the IETF for consideration as a potential standard. The entire protocol has not yet been accepted as a standard and remains proprietary to Cisco. Therefore, some portion of EIGRP is open standard & some portion of it is Read More …
OSPF Interview Questions & Answers
What is OSPF? Open Shortest Path First is an open standard link state routing protocol which works by using Dijkastra’s SPF algorithm to find the shortest paths. What is OSPF Router ID? OSPF Router ID is an identifier which is used to identify the Router. It is a 32-bit number. How does a Router select its OSPF Router ID? Most of Routers (including Cisco) derive the Router ID in the following precedence order: Manually configured Router ID Highest Loopback Address Highest Physical IP Address on the Router What are OSPF Timer (Intervals)? Below are OSPF Intervals: OSPF Read More …