Routers have a built-in console that lets you configure different settings, like security and data logging. And if you're a job candidate, enjoy this sneak peek as you get ready to ace all your networking interview questions. Using handshake protocol like SYN, SYN-ACK, ACK, No handshake (so connectionless protocol). Windows Firewallâ is an inbuilt Microsoft Windows application that comes along with the operating system. This layer provides the protocols and means for two devices on the network to communicate with each other by holding a session. If the Hub or concentrator fails, attached nodes are disabled. At the same time, the same range of private IP addresses is reusable for multiple intranets since they do not "see" each other. Partial Mesh Topology: In this type of topology, most of the devices are connected almost similarly as full topology. They are mentioned below: Answer: In Networking, when a task is in progress another task gets started before the previous task is finished. UDP messages contain packets that were sent one by one. Digital hardware offers flexibility in implementation. 54) What is the proper termination rate for UTP cables? Here are the important types of MAC addresses: UAA(Universally Administered Address) is the most used type of MAC address. There are four layers as shown in the below diagram: Given below is a brief explanation of each layer: Q #9) What is HTTP and what port does it use? If it begins with bits 10 then that address is a Class B address. Answer: If a network self-repair its problem then it is termed as Beaconing. Answer: Encoder is a circuit that uses an algorithm to convert any data or compress audio data or video data for transmission purposes. Software related problems can be any or a combination of the following: ICMP is an Internet Control Message Protocol. Q #36) In how many ways the data is represented and what are they? There are 3 main versions of SNMP which include SNMPv1, SNMPv2, and SNMPv3. What types of network â¦ And a break at a node in the network can affect the whole network. Communication means the process of sending and receiving data between two media (data is transferred between source and destination in both ways). Answer: HTTP is HyperText Transfer Protocol and it is responsible for web content. It is a system where a set of computers or physical devices are connected by using single transmission technology. For Class A, there are 126 possible networks and 16,777,214 hosts. The advantage of bus topology is that it can be installed easily. Update â¦ In bi-directional communication, the HTTPs protocol encrypts the communication so that the tampering of the data gets avoided. It provides messaging and communication for protocols within the TCP/IP stack. They are listed below: Q #30) A few important terminologies we come across networking concepts? Logical Topology deals with the flow of data over the networks. Q #45) Why the standard of an OSI model is termed as 802.xx? The decoder is a type of circuit that converts the encoded data to its original format. 101) What is the 5-4-3 rule, and in which architecture is it used? Q #25) What are the different types of a network? UDP is suitable for the applications which require fast transmission of data and time is crucial in this case. The following are some questions you may wish to consider asking when networking with individuals or potential employers. The MAC address stands for Media Access Control Address. KALI LINUX is a security distribution of Linux derived from Debian and... $20.20 $9.99 for today 4.5 (112 ratings) Key Highlights of Ethical Hacking Tutorial PDF: 204+... A switch operates on the data link layer. It is the one of the most preferable and trending job in India. 132) What are the differences between analog and digital signal? As networking is a complex topic, one needs to be careful while answering the questions in an interview. 66) What are the maximum networks and hosts in class A, B, and C network? It shows how devices and cables are physically laid out, as well as how they connect. Network engineer Interview Questions. Both protocols TCP and UDP are used to send bits of data over the Internet, which is also known as âpacketsâ. A Computer Science portal for geeks. Â It also helps to modify the DHCP protocol and DNS setting. Q #57) How can you recover the data from a system which is infected with a Virus? A firewall acts as a gatekeeper which prevents unauthorized users to access the private networks as intranets. It can only take on one of a fixed number of values. All Internet service providers and different host companies usually interact with this central registry to get the updated DNS details. The mesh topology has a unique network design in which each computer on the network connects to every other. ; Let us move to the next Computer Network Interview Questions. Answer: The OSI model was started in the month of February in 1980. Q #47) How can a network be certified as an effective network? It keeps track of transmission and sends the segments again if the transmission fails. Network topology dictates what media you must use to interconnect devices. The Digital signal uses discrete 0 and 1 to represent information. Hereâs our roundup of 10 killer questions that you should ask all your candidates. Q #7) What is the difference between Hub, Switch, and Router? TCP offers extensive error checking mechanisms because it provides flow control and acknowledgment of data. Post a Job. Answer: Common factors in TCP and UDP are: The difference between TCP and UDP are enlisted in the below table: Answer: Firewall is a network security system that is used to protect computer networks from unauthorized access. No, Nowadays, coaxial cable no longer used in a computer network. It also converts the digital signal into an analog signal. NOS, or Network Operating System, is specialized software. There are several ways to do this. In this rule, there can be a maximum of five segments in a network connected with four repeaters. Answer: There are three types of Internet connections. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. Routers operate under this layer. This âWindows Firewallâ also helps to prevent viruses, worms, etc. Out of these five segments, only three segments can be populated with nodes. Earlier, for appearing in an interview, people used to go through all the concerned books and materials available page by page carefully. Q #20) What is the difference between the Internet, Intranet, and Extranet? 15 Questions For Your Business Networking Success Are you attending networking events and not generating any business leads? In a network, nodes are used to connect two or more networks. Linux Interview Questions ; Question â¦ MAC address helps you to prevent unwanted network access. 114) Which cable is also called as the RG8 cable? It helps to know how data is being transferred from one network to another network â¦ Ethernet is one of the popular networking technologies used these days. The only difference is that few devices are connected with just two or three devices. Netstat is a command-line utility program. Suppose in DHCP server running network (assigning ip addresses automatically), you connect a Laptop in the same â¦ Here is the major difference between Hub and switch: 65) What are the different network protocols that are supported by Windows RRAS services? It was developed during the early 1970s and is based on specifications, as stated in the IEEE. In 802.XX, '80' stands for the year 1980, and '2' represents the month of February. Generally, we assign names to websites and computers like Gmail.com, Hotmail, etc. 1. It is also known as a physical address or an Ethernet address. DHCP is used to assign IP addresses automatically to the devices over the network. Routers operate at the OSI Network Layer. It is a network component that is used to send, receive and forward the electronic information. A node refers to a point or joint where a connection takes place. Define Network? In case one workstation on the network suffers a malfunction, it can bring down the entire network. It also decodes carrier signals to demodulates the transmitted information. 53) What can be considered as good passwords? NIC is short for Network Interface Card. Answer: Data transmitted through the networksâ comes in different ways like text, audio, video, images, numbers, etc. Then connect the HDD of the infected system as a secondary drive. CSMA/CD, or Collision Detect, retransmits data frames whenever a collision occurred. LAA (Locally Administered Address) is an address that changes the MAC address of the adapter. A common way of dealing with such a problem is to use repeaters and hubs because it will help regenerate the signal and therefore prevent signal loss. HTTPs provides authentication of websites that prevents unwanted attacks. The proper termination for unshielded twisted pair network cable is 100 ohms. Digital signal has a finite number, i.e., 0 and 1. Top Networking Interview Questions. 64) What is the difference between a hub and a switch? Rights refer to the authorized permission to perform specific actions on the network. Q #38) How a Switch is different from a Hub? Q #6) What are the layers in OSI Reference Models? By using a Virtual Private Network (VPN), users can connect to the organization's network. Full Mesh Topology: In this topology, every node or device are directly connected with each other. Transmission Control Protocol and Internet Protocol. please visit our networking job interview questions â¦ Let’s take a look at each of them in detail. Dear Readers, Welcome to Networking Interview questions with answers and explanation. If a destination computer is on the remote network then the frames are routed through a gateway or router to the destination computer. 93) What is the role of the IEEE in computer networking? It can show the physical address as well as the IP address. Private IP addresses are assigned for use on intranets. What is a network? A link refers to the connectivity between two devices. OSI (Open Systems Interconnect) serves as a reference model for data communication. Hamming code not only provides the detection of a bit error but also helps you to indent bit containing error so that it can be corrected. The Hamming code method is effective on networks where the data streams are given for the single-bit errors. Answer : Its used to connect same type of devices without using a switch/hub so that they can communicate. Passwords must be not words that can easily be guessed by hackers, such as dates, names, favorites, etc. Hamming code is a liner code that is useful for error detection up to two immediate bit errors. Instead of having to visit each client computer to configure a static IP address, the network administrator can apply dynamic host configuration protocol to create a pool of IP addresses known as scopes that can be dynamically assigned to clients. There are four layers: 1) The Network Layer, 2) Internet Layer, 3) Transport Layer, and 4) Application Layer. TCP/IP specifies how data should be packaged, transmitted and routed in their end to end data communication. It is used to transfer information from the source to the destination. So it is standardized as 802.XX. With the help of DHCP, IP management became very easy. For Example, A computer network is a group of computers connected with each other to communicate and share information and resources like hardware, data, and software. The TCP/IP Application layer has three counterparts on the OSI model: 1) Session Layer, 2) Presentation Layer, and 3) Application Layer. To connect a network of personal computers should be joined through a central hub. The word Base refers to baseband, as opposed to broadband. Answer: VPN stands for Virtual Private Network. Yes, you can connect two computers, using only one cable. It also checks for integrity at the arrival time. Answer: OSI model stands for Open System Interconnection It is a framework that guides the applications on how they can communicate in a network. 96) What is one basic requirement for establishing VLANs? The Modem is the most widely used data communication roadway. Here, are three most important elements of the protocol: 104) What is the maximum segment length of a 100Base-FX network? 108) Why the standard OSI model is known as 802.xx? Ans: When the topology enables the computers on the network only to simply listen and receive the signals, it is â¦ 82) What is the importance of Encryption on a network? These redundant bits are mostly inserted and generated at certain positions in the message to accomplish the error detection and correction process. It means that data transmission and reception would be affected because the signal degrades over length. The firewall consists of a hardware device, software program or a combined configuration of both. It prevents malicious access from outside to the computer network. 67) What is the standard color sequence of a straight-through cable? About us | Contact us | Advertise | Testing Services RIP, short for Routing Information Protocol is used by routers to send data from one network to another. By looking at the first octet of any given IP address, you can identify whether it's Class A, B, or C. If the first octet begins with a 0 bit, that address is Class A. It refers to the connection between computers and other network devices that are located within a small physical location. Example: Ethernet. What Are The Types Of Lan Cables Used? The default gateway for connecting to the external network is usually the address of the external router port. 112) Which measurement unit is used to measure the transmission speed of Ethernet? In this setup, the data transmit pin of one cable is connected to the data receive pin of the other cable, and vice versa. Answer: VPN is the Virtual Private Network and is built on the Internet as a private wide area network. HTTPs is used for secure communication over a computer network. 52) What is the use of a default gateway? Each computer has their own authentication rule for every user account, It has centralized authentication servers which set the rule of authentication, Each computer has set of user account. 50) How can you manage a network using a router? An algorithm called cipher is used in this conversion process. This variable-length data sequence is also known as âDatagramsâ. Good passwords are made up of not just letters, but by combining letters and numbers. A firewall can also be built to grant limited access to outside users. Q #16) What are IP classes and how can you identify the IP class of given an IP address? It also supports higher bandwidth, meaning more data can be transmitted and received. You can even put restrictions on what websites are not viewable across the entire network. VLAN on switch helps to create a separate broadcast domain at the switch level. b) Data Link Layer (Layer 2): At the Data Link layer, data packets are encoded and decoded into bits and it provides a node to node data transfer. Redirector is a kind of software which intercepts file or prints I/O requests and translates them into network requests. Performance depends on the Hub's capacity. There are some other types of the network as well: Q #26) Differentiate Communication and Transmission? What is a Firewall in Computer Network? There are 4 protocols that are being managed by this layer. The cost of installation of star topology is costly. To begin with, here are the ten most important Networking Interview Questions: Q1. Switched connections - using multiple sets of links between the sender and receiver to move data. A backbone network is a centralized infrastructure that is designed to distribute different routes and data to various networks. Orange/white, orange, green/white, blue, blue/white, green, brown/white, brown. SNMP is widely used in network management for configuring network devices like switches, hubs, routers, printers, servers. 16) How does a network topology affect your decision to set a network? 44) What are the functions of a network administrator? When a message or a packet is passed through the communication network (OSI layers), every layer adds its header information to the actual packet. Without this, no connection can take place. These addresses are used for internal networks and are not routable on external public networks. Make sure firewalls are setup and configured correctly. Answer: In a computer network, to enable data transmission from one computer to another, the network devices send messages in the form of packets. If there is no response from the server then there are various causes like the network is down or the cable needs to be replaced or the network card is not in good condition. 24) What is the function of the OSI Session Layer? If a device in the network is facing any problem, then it notifies the other devices that they are not receiving any signal. The Network layer is responsible for data routing, packet switching, and control of network congestion. Network engineers are associated with the responsibility of creating computer network â¦ What Is A Cross Cable? One layer may deal with the physical media used, while another layer dictates how data is transmitted across the network. The maximum allowable length for a network segment using 100Base-FX is 412 meters. Layer 6 transforms the data into the form in which the application layer accepts. Answer: An IP address has 4 sets (octets) of numbers each with a value up to 255. The process of removing the headers added by the OSI layers from the actual packet is termed as Decapsulation. MAC address is a unique number. CISSP- full form Certified Information Systems Security Professional is considered as a... What is Digital Forensics? 127.0.0.1 is a loopback connection on the Network Interface Card (NIC) and if you are able to ping this server successfully, then it means that the hardware is in a good shape and condition. The Analog signal doesn't offer any fixed range. What are your primary job responsibilities? 91) Explain profile in terms of networking concepts. It is not connection-based, so one program can send lots of packets to another. A link is used to connect more than two devices of a network. 10) What is the maximum length allowed for a UTP cable? Class C has a range from 192.x to 223.x. b) Star Topology: In Star Topology, there is a central controller or hub to which every node or device is connected through a cable. In this case, it is 10Mbps. Answer: The main characteristics of networking are mentioned below: Q #32) How many types of modes are used in data transferring through networks? When you go to a networking event, your conversations will be a lot â¦ Switch: Switch will create the dynamic connection and provide information to the requesting port. Answer: When a device or computer is assigned a specified IP address then it is named as Static IP. If user has account on that computer then only user able to access the computer, If user has an account in a domain then user can login to any computer in a domain, Workgroup does not bind to any security permission or does not require any password, Domain user has to provide security credentials whenever they are accessing the domain network, Computer settings need to change manually for each computer in a Workgroup, In a domain, changes made in one computer automatically made same changes to all other computers in a network, All computers must be on same local area network, In a domain, computers can be on a different local network, In a Workgroup, there can be only 20 computers connected, In a domain, thousands of computers can be connected. a. Translating the names into numbers or IP address is named as a Forward lookup. 2. It is used for security purposes. This â80â stands for the year 1980 and â2â represents the month of February. TCP is a connection oriented protocol, UDP is connectionless, simple protocol. 40) What is the disadvantage of a star topology? Varied ports have separate collision domains. And more than two links located nearby form a topology. This is one of the protocols that are used for remote access. The maximum length for a network segment using 100Base-FX is 412 meters. You can assign restrictions to computers, such as what resources it is allowed access or what particular time of the day, they can browse the Internet. All the public IP addresses and their hostnames are stored in the DNS and later it translates into a corresponding IP address. Ping is a utility program that allows you to check connectivity between network devices on the network. You can plug in their removable hard drives or flash drives. There are three types of IP classes and are based on the first octet of IP addresses which are classified as Class A, B or C. If the first octet begins with 0 bit then it is of type Class A. For a Class C network, the number of usable Network ID bits is 21. TCP does error checking and also makes error recovery. A network consists of two or more separate devices linked together such that they can communicate. The advantage of ring topology is that it can be installed easily. Hub is least expensive, least intelligent and least complicated of the three. Here, are some difference between MAC and IP address: Analog signal is a continuous signal in which one time-varying quantity represents another time-based variable. A modem (modulator-demodulator) is a device that modulates an analog signal to digital information. 34) What is the equivalent layer or layers of the TCP/IP Application layer in terms of the OSI reference model? For Example, When you type a website www.softwaretestinghelp.com, then your Internet service provider looks for the DNS associated with this domain name and translates this website command into a machine language â IP address â 126.96.36.199 (note that, this is the imaginary IP address and not the actual IP for the given website) so that you will get redirected to the appropriate destination. When packets are transferred using either TCP or UDP, it is sent to an IP address. The below diagram shows how these components are connected with each other in the SNMP architecture: SNMP is a part of the TCP/IP suite. Q #15) What is a Proxy Server and how do they protect the computer network? 18) What are the different ways of securing a computer network? The ease of use of hamming codes makes it suitable for use in computer memory and single-error correction. Q #28) Explain various types of networks based on their sizes? IEEE, or the Institute of Electrical and Electronics Engineers, is an organization composed of engineers that issues and manages standards for electrical and electronic devices. It is also known as Network Adapter or Ethernet Card. UDP is faster as error recovery is not attempted. And the disadvantage is that if the backbone cable breaks then the whole network will be down. So, it uses the IPsec protocol to secure all communication that passes through it. If you go through the interview questions on the networking of this article, you can easily get through the interview. It first checks for the next available address not yet taken by any device, then assigns this to a network device. Answer: Network Topology is nothing but the physical or logical way in which the devices (like nodes, links, and computers) of a network are arranged. 32) What is the advantage of address sharing? These networks are usually reserved for the biggest customers or some of the original members of the Internet. 15) What is the job of the Network Layer under the OSI reference model? The below list covers 130+ important interview questions for Networking for freshers candidates as well as Networking interview questions for experienced. For Example, A computer network â¦ It determines the network distance in units of hops. Answer: The terminologies Internet, Intranet, and Extranet are used to define how the applications in the network can be accessed. Describe Hub, Switch and Router? It is made up of 7 layers, with each layer defining a particular aspect of how network devices connect and communicate with one another. Network topologies are classified as below: a) Bus Topology: In BusÂ Topology, all the devices of the network are connected to a common cable (also called as the backbone). The 10 refers to the data transfer rate. Q #33) Name the different types of network topologies and brief their advantages? A damaged cable or lack of proper termination may bring the network down. A subnet mask is combined with an IP address to identify two parts: the extended network address and the host address. The delivery of data to the destination can't be guaranteed in UDP. Here are some common applications of using Hemming code: 125) What are the benefits of the Hamming code? The physical boundary of Network B. More useful in connecting LAN with the Internet. That's because individual users can access any workstation and introduce a computer virus. It is the neighboring autonomous systems that help you to identify the set of networks that you will able to reach within or via each independent system. For Class B, there are 16,384 possible networks and 65,534 hosts. Ethernet is used in local area networks. Most Frequently asked Networking Interview Questions and Answers with Pictorial Representation for your easy understanding: In this advanced technology world, there are none who have never used the Internet. The command Ipconfig is useful for displaying all TCP/IP network summary information currently available on a network. 68) What protocols fall under the Application layer of the TCP/IP stack? TCP is reliable as it guarantees delivery of data to the destination router. Collisions occur mostly in setups using hubs. Q #10) What is HTTPs and what port does it use? The main disadvantage of the star topology is that all the devices of the network are dependent on a single point (hub). Networking refers to the interconnection between computers and peripherals for data communication. It also helps to understand the relationship between networks and defines the process of communication in a network. However, computers that are running on an office network or any workplace network belong to the Domain. Thicknet cable is also called as the RG8 cable. It establishes, coordinates, exchange and terminates the connections between local and remote applications. The full form of EGP is Exterior Gateway Protocol. Clients refer to a workstation that accesses the server. The OSI model was started in February 1980. Answer : Straight Cable; Cross Cable; Question 9. Answer: Two or more computers are connected directly by an optical fiber or any other cable. Servers provide a centralized repository of resources such as printers and files. It is the protocol of the routers. Answer: Data transferring modes in computer networks are of three types. Hope i have covered almost all the important types of network wherein one or more computers act as workstations... Communicating computers do not use IPsec themselves centralized infrastructure that is attached to a MAC address gets transferred one. Integrity at the time of manufacturing, C, d, and how you. Send data from one computer to another and reaches the destination computer books up and maintain guaranteed in.... Redundant bits are mostly inserted and generated at certain positions in the network automatically credentials before can. All the important types of MAC addresses are displayed as a translator between domain names and IP are. Connection takes place the next available address not yet taken by any device RARP protocol malfunction it. Dates, names, favorites, etc cards of both hub or combined. You use cables longer than the prescribed length you get ready to all... A layer 1 device per the OSI reference model means of limiting from. Answer/Solution to whatever he/she doesn ’ t know with the software Application upon type... Is not connection-based, so one program can send lots of packets to another hardware Engineer etc NIC circuitry not! Layer is responsible for forwarding data packets in 10Base2 and 10Base5 Ethernet architectures Base... ) in how many layers are there under TCP/IP router, a hub, video images. In Class a type has a range up to 127.x.x.x ( except 127.0.0.1 ) connection issue, the protocol! To represent information that 's because host PCs on this network service is to assign an IP.... Protocol, is specialized software located within a network such as the cable. And can not be identified is TCP/IP i.e 82 ) What is the difference between baseband and broadband transmission encapsulates. To start a Telnet session makes error recovery is not connection-based, so one program can send of... Associated with the latest updates rights, depending on What websites are not receiving any signal a to... Not receiving any signal domain at the arrival time a code that is to. Interfaces that multiple IP addresses of an OSI model frame that contains the hardware of. 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