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Protocols Interview Questions & Answers - Learning Mode
COOLINTERVIEW.COM PROTOCOLS INTERVIEW QUESTIONS QUESTIONS & ANSWERS - LEARNING MODE

Protocols Interview Questions & Answers - Learning Mode

In information technology, a protocol is the special set of rules that end points in a telecommunication connection use when they communicate. Protocols specify interactions between the communicating entities. One of the most common and known protocols is HTTP (HyperText Transfer Protocol), which is a protocol used to transmit data over the world wide web (Internet). Protocol is an agreed-upon format for transmitting data between two devices. It determines type of error checking and data compression used.

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Subcategories for Protocols Interview Questions & Answers - Learning Mode

Following are sub categories for which Interview Questions & Answers are available under Protocols Interview Questions & Answers - Learning Mode. Please select the appropriate sub-category:-

FTP Protocol Interview Questions & Answers (17) Learning Mode | Exam Mode

HTTP Protocol Interview Questions & Answers (31) Learning Mode | Exam Mode

IMAP Protocol Interview Questions & Answers (10) Learning Mode | Exam Mode

IP Protocol Interview Questions & Answers (36) Learning Mode | Exam Mode

ISTP Interview Questions & Answers (10) Learning Mode | Exam Mode

Mobile IP Interview Questions & Answers (11) Learning Mode | Exam Mode

POP Protocols Interview Questions & Answers (21) Learning Mode | Exam Mode

SMTP Protocol Interview Questions & Answers (19) Learning Mode | Exam Mode

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Protocols Interview Questions & Answers - Learning Mode
Try Protocols Interview Questions & Answers - Exam Mode
Question: Name some routing protocols? (RIP,OSPF etc..)



Answer: RIP(ROUTING INFORMATION PROTOCOL)
IGRP( INTERIOR GATEWAY ROUTING PROTOCOL)
EIGRP(ENHANCED INTERIOR GATEWAY ROUTING PROTOCOL)
OSPF (OPEN SHORTEST PATH FIRST)
BGP( BORDER GATEWAY PROTOCOL) Source: CoolInterview.com
Question: What is Router? Explain components of Routers.

Answer: The way switches connect multiple computers, a router connects multiple networks. Routers comprise of data consisting of large tables of networks and addresses. Routers use algorithms to determine the shortest route to an address in a network. Source: CoolInterview.com
Question: What is IGMP protocols?

Answer: Internet Group Management Protocol, allows internet hosts to multicast. i.e. to send messages to a group of computers. There may be a group of internet hosts interested to multicast. IGMP allows router to determine which host groups have members on a given network segment. It helps to establish group memberships. It is commonly used for streamlining videos and gaming. The protocol can be implemented both as a host side and router side. The host side is responsible to notify its membership in a g Source: CoolInterview.com
Question: What is the use of method ? ?spawn()??

Answer: This method is used to launch a new process with the given commands. Below is the method signature ?

child_process.spawn(command[, args][, options]) Source: CoolInterview.com
Question: What is an application gateway?

Answer: An application gateway is an application program that runs on a firewall between two networks. An application gateway is used for establishing connection between client program and destination service. The client negotiates with the gateway to communicate with the service of destination. Here, gateway can be called as a proxy. Hence, two connections are made. One between client and proxy; other, between proxy and destination service. Connections take place behind the firewall Source: CoolInterview.com
Question: Explain IP datagram, Fragmentation and MTU?

Answer: IP datagram can be used to describe a portion of IP data. Each IP datagram has set of fields arranged in an order. The order is specific which helps to decode and read the stream easily. IP datagram has fields like Version, header length, Type of service, Total length, checksum, flag, protocol, Time to live, Identification, source and destination ip address, padding, options and payload.<br><br>MTU:- Maximum Transmission Unit is the size of the largest packet that a communication pro Source: CoolInterview.com
Question: Overview of OSI layer?

Answer: OSI stands for Open Systems Interconnection<br><br>The OSI reference model gives an overview of the layered communications and computer network protocol design.<br><br>The layers of the OSI are:<br><br> * Application Layer<br> * Presentation Layer<br> * Session Layer<br> * Transport Layer<br> * Network Layer<br> * Data Link Layer<br> * Physical Layer Source: CoolInterview.com
Question: What is DHCP Relay Agent?

Answer: No answer available currently.
Question: What is DSCP ?

Answer: DHCP means dynamic host control protocal it provides automatic ip address to all the system in a networking. Source: CoolInterview.com
Question: How to copy buffers in NodeJS?

Answer: Below is the syntax to copy buffers in NodeJS ?
buffer.copy(targetBuffer[, targetStart][, sourceStart][, sourceEnd]) Source: CoolInterview.com
Question: What is PPP protocol? Explain PPP packet format?

Answer: Point to Point protocol helps communication between 2 computers over a serial cable, phone line or other fiber optic lines. E.g. Connection between an Internet Service Provider and a host. PPP also provides authentication. PPP operates by sending Request packets and waiting for Acknowledge packets that accept, reject or try to change the request. The protocol is also used to negotiate on network address or compression options between the nodes.<br><br>Packet format:-<br><br& Source: CoolInterview.com
Question: Explain callback in Node.js?

Answer: Callback is called once the asynchronous operation has been completed. Node.js heavily uses callbacks and all API?s of Node.js are written to support callbacks. Source: CoolInterview.com
Question: What are the basic components of routers?

Answer: Components of Router:-

Internal components:

1.ROM:- Used to store the routers bootstrap details, operating system software.
2.Flash memory: - holds the operating systems images. The content is retained when the router is restarted.
3.RAM: - Used to store the Routing tables, configuration files, caching and buffering details. Content is lost when lost router is switched off or restarted.
3.NVRAM:- Stores the routers startup config files. Data is non volatile.
4.Network i Source: CoolInterview.com
Question: Explain Circuit Level Gateway.

Answer: A circuit level gateway is used to find if a session in TCP handshaking is legitimate or not. It can be considered as a layer between application layer and transport layer. They protect the information of the private network they protect. Circuit level gateways do not filter packets. Source: CoolInterview.com
Question: What is the underline protocol of RTP session in SIP call flow ?



Answer: No answer available currently.
Question: What is NETBIOS protocols?

Answer: NetBIOS (Network Basic Input/Output System) Protocol allows applications on separate computers to communicate over a LAN. It runs over TCP/IP giving each computer in the network a NetBIOS name and IP address. E.g. It can be used for computers running Windows 2000 (or before) to join a computer network running Windows 2000 (or later). Source: CoolInterview.com
Question: Explain ?Callback hell??

Answer: ?Callback hell? will be referred to heavily nested callbacks which has become unreadable or unwieldly. Source: CoolInterview.com
Question: Explain the concept and capabilities of Unicast IP Addresses?

Answer: It is an IP address that uniquely identifies a host in a network.<br>The datagram with a unicast IP address is received and processed by only a single host. Source: CoolInterview.com
Question: Which protocol is called as 'Watch Dog'?

Answer: the novel netware support the protocol The Watchdog (WDOG) protocol provides constant validation of active workstation connections and notifies the NetWare operating system when a connection may be terminated as a result of lengthy periods without communication Source: CoolInterview.com
Question: What is 'Gateway Of Last Resort'?

Answer: A Gateway of Last Resort or Default gateway is a route used by the router when no other known route exists to transmit the IP packet. Known routes are present in the routing table. Hence, any route not known by the routing table is forwarded to the default route. Each router which receives this packet will treat the packet the same way, if the route is known, packet will be forwarded to the known route. Source: CoolInterview.com

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