+ Hardware And Networking Interview Questions and Answers, Question1: What is a node and links? Question2: What are the layers of the OSI reference. Top Networking Interview Questions & Answers. 1) What There are 7 OSI layers: Physical Layer, Data Link Layer, Network Layer, .. Incorrectly hardware. The address resolution protocol (ARP) is used to associate the 32 bit IP address with the 48 bit physical address, used by a host or a router to find the physical.
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You have to be well-prepared to crack a networking job interview. Here are some of the probable Hardware and Networking Interview. Top Hardware & Networking Interview Questions & Answers - Download as Word Doc .doc), PDF File .pdf), Text File .txt) or read online. Top Hardware. HARDWARE-PLUSQUESTION-ANSWER-HCL-CDC-MEERUT-a-related- aracer.mobi - Download as .rtf), PDF.
A layer of a glass surrounding the center fiber of glass inside a fiber-optic cable. What Is Netbios And Netbeui?
A transport protocol designed by Microsoft and IBM for the use on small subnets. What Is Beaconing? The process that allows a network to self-repair networks problems. The stations on the network notify the other stations on the ring when they are not receiving the transmissions. Telnet is also called as terminal emulation.
It belongs to application layer. Frame relay is a packet switching technology. It will operate in the data link layer. The standard protocol has been defined between the terminal and the PAD, called X. Together, these three recommendations are often called "triple X".
Series of interface points that allow other computers to communicate with the other layers of network protocol stack. A generic term for section of a large networks usually separated by a bridge or router.
What Is Subnet Mask? It is a term that makes distinguish between network address and host address in IP address. Subnet mask value 0 defines host partition in IP address and value 1 — defines Network address.
Describe Various Network Type? Local Area Networks Local area networks LANs are used to connect networking devices that are in a very close geographic area, such as a floor of a building, a building itself, or a campus environment.
Companies deploy basically two types of CNs: Distributing Internet traffic loads across multiple servers Storage Area Networks Storage area networks SANs provide a high-speed infrastructure to move data between storage devices and file servers. Disadvantage of SANs is their cost. Intranet An intranet is basically a network that is local to a company. In other words, users from within this company can find all of their resources without having to go outside of the company.
Extranet An extranet is an extended intranet, where certain internal services are made available to known external users or external business partners at remote locations. Internet An internet is used when unknown external users need to access internal resources in your network. In other words, your company might have a web site that sells various products, and you want any external user to be able to access this service. A VPN is used to provide a secure connection across a public network, such as an internet.
Extranets typically use a VPN to provide a secure connection between a company and its known external users or offices. Authentication is provided to validate the identities of the two peers. Confidentiality provides encryption of the data to keep it private from prying eyes.
Integrity is used to ensure that the data sent between the two devices or sites has not been tampered with. It is an alternative to the Routing Information Protocol.
The three types of routing tables are fixed, dynamic, and fixed central. What Is Packet Filter? Packet filter is a standard router equipped with some extra functionality. The extra functionality allows every incoming or outgoing packet to be inspected.
Packets meeting some criterion are forwarded normally. Those that fail the test are dropped. The same message might contain the name of the machine that has the boot files on it. If the boot image location is not specified, the workstation sends another UDP message to query the server.
DNS resource record is an entry in a name server's database. There are several types of resource records used, including name-to-address resolution information. It is a better choice than TCP because of the improved speed a connectionless protocol offers. Of course, transmission reliability suffers with UDP.
Interior gateways connect LANs of one organization, whereas exterior gateways connect the organization to the outside world. When hierarchical routing is used, the routers are divided into what we call regions, with each router knowing all the details about how to route packets to destinations within its own region, but knowing nothing about the internal structure of other regions. What Is Multicast Routing? Sending a message to a group is called multicasting, and its routing algorithm is called multicast routing.
What Is Traffic Shaping? One of the main causes of congestion is that traffic is often busy. If hosts could be made to transmit at a uniform rate, congestion would be less common. Another open loop method to help manage congestion is forcing the packet to be transmitted at a more predictable rate. This is called traffic shaping. Computer Fundamentals Tutorial. Hardware And Networking Practice Tests.
IT Skills. Management Skills. Communication Skills. Business Skills. Digital Marketing Skills. Human Resources Skills. Health Care Skills. Finance Skills. All Courses. All Practice Tests. Application Layer Question 3.
Describe Domain Name System Answer: When the signal travels through the medium from one point to another it may chance to change the form or shape of the signal. It is called distortion. Distortion can occur in a composite signal made up of different frequencies. Each signal component has its own propagation speed through a traveling medium and, therefore, its own delay in reaching the final destination. Means signal components at the receiver have phases different from what they had at the sender.
The third cause of impairment is Noise. Following types of noise are possible. Thermal noise. Induced noise. Crosstalk noise. Impulse noise. Question 7. What Is Ip? Question 9. What Is A Layer?
Complementary metal oxide semiconductor Question What Is Sap? What Is Subnet? Availability is high because of the redundancy features available.
Distances can span up to 10 kilometers. Management is easy because of the centralization of data resources. Overhead is low uses a thin protocol. A fixed table must be manually modified every time there is a change. A dynamic table changes its information based on network traffic, reducing the amount of manual maintenance. A fixed central table lets a manager modify only one table, which is then read by other devices.
The fixed central table reduces the need to update each machine's table, as with the fixed table. Transfer Stage Which component of the laser printer must be vacuumed or replaced during preventive maintenance? Ozone filter Oil During preventive maintenance on a dot matrix printer. If your hard drive light is constantly blinking while you are using one of your applications.
If you notice your dot matrix printer is starting to print faint. Highest How many Ohms should your meter register if you are testing a good circuit? What is happening during the initial memory A: The system is checking to see that contiguous memory is installed. A resistor grounding This symbol represents what? Change the ribbon ESD damage can be A: What device A: Battery backup units UPS prevents caused power by? What is the best way to protect your computer during an electrical storm?
Disconnect all external cables and power cords Can A: Yes a monitor hold a charge even after you have What should you do first when troubleshooting A: Check the connections to the power source and to the computer.
When you measure an unknown voltage source. Dial Up access is the cheapest way to access the Internet? If a monitor only displays blue or green. A user calls and says his PC was working fine yesterday but he turned on this morning and he is getting an error that reads "Invalid System Disk".
The RED electron gun is broken. What can be used to ensure A: When is the risk of A: During low humidity Dry and cold. Keyboard What type of output device should never be hooked up to a switch box? Laser printer Does it matter which lead of a voltmeter is connected to an AC circuit? No Does A: Extended shadowing normally Simultaneous Transmit and Receive occur in Full conventional or Duplex extended memory?
Fragmented What command would you type to fine out how much and what type of memory you have available? MEM You just bought a new video card. When you power up the monitor. A Ground EISA Which SCSI How many pixels does a standard VGA display have in its native graphics mode? When the files on your hard drive are not stored in consecutive clusters. What is an important question to answer before installing? What are the available IRQ's How long should you wait for the CRT to discharge before opening the case?
What could be the problem? Floppy in drive A: What would it mean if you did not hear any beeps when you boot your computer? Bad or disconnected speaker.
Paper has picked up too much moisture. The first few sheets come out smudged.
Ymodem Zmodem are the 3 types of modem Xmodem transmission protocols? If the characters printed on a dot matrix appear chopped off at the top. The resolution of a monitor will always ultimately be determined by what? The number of triads What is the correct handshake signals A: C and D. What should you do to fix this? Misaligned printhead Zmodem No Will is the you most ever Modulator Demodulator PCI What Most A: In Inkjet technology. You have just replaced the toner cartridge in a laser printer.
ISA system? SCSI-2 chain? What is the first step to be performed after installing a new blank hard drive? Partition the hard drive. What product A: Denatured Alcohol RJ must type you of use to connection clean the ports rubber do rollers most on a modems printer? In the AT type PCs. Electrically charged plates External A: Serial modems are Electromagnetic Interference usually connected does to which EMI type stand of ports? If a laser printer keeps grabbing more than one sheet of paper at a time.
When testing household current. Transferring multiple bits of data over several conductors at one time is what type of communication? Parallel When a power cable and a printer cable get too close together. An error A: Memory overflow code the keys 20 on on an a HP keyboard. Run a few blank sheets trough until smudging stops. What could cause this?
No power to the primary corona The distance between two adjacent phosphors of the same color on the CRT screen is known as? Dot pitch How often should A: When you send print to your laser printer. Serial A laser printer generates a totally black sheet. What is most likely the cause? No power to the transfer corona.
EMI No Should Speed RAM Bad yoke coil When cleaning A: Improper installation of the floppy drive ribbon cable can cause permanent damage to your PC? False What are the P8 A: They connect the power supply to the motherboard. There is no active partition A bi-directional A: IEEE parallel cable is also known by what specification?
If your monitor only shows a single line. ESD is not. The major difference A: EMI is recoverable. Unused memory in the reserved area is called? Which of the questions listed below could you ask? Occurrence how often? Do you have a sample? What applications are being used? Where is the printer located? Which of the following should be considered when storing laser printer paper?
Location Temperature Humidity Which bus type was introduced by IBM and was not accepted by the industry? MCA Printer Surge Suppressor device can takes you use advantage to prevent of power EMF surges to What is the purpose A: Turns digital signals into analog signals and vice versa.
Bad power supply Standard A: Erratic ribbon advancement Your client gets garbage characters when trying to print a document. ESD and between spooling? EMI is? You are testing a household electrical outlet. What type of electrical device allows current to only flow in one direction? Diode Pentium type of processor How often does A: Every 16 milliseconds Sector an IDE Dynamic the hard Head to disk interference has the to for HDI be unit of a cache? With a dot matrix printer. Transistor US the is base.
System BIOS DB9 Floppy drive letters A: Position of the drive on the floppy cable. What is the first thing you would do? Check the monitor adjustment controls What tool A: High voltage probe would The video A: What would you use to clean A: What is the most A: Press DEL key at boot-up Setup processor CRT address?
In case the low voltage power supply overheats. His PC apparently seems to boot OK and is running. A customer calls and says that his monitor light is on but he has no display. What is the possible cause?
Faulty power supply The most A: What does this point to? Hard Drive Controller Reserved Memory are When servicing a dot matrix printer. The K of memory A: Upper or Reserved Memory Thermal Fuse? You get a call from a user complaining that his computer consistently locks up after only 5 minutes of operation.
Printhead Add RAM action will enable more applications to run simultaneously? Will hardware components pass diagnostics? Which of the following would be a logical first step in trouble shooting a PC?
Define the circumstances of the problem During A: What is the first thing you could do to check for damage to a printer after receiving it? What should be considered? The cables are attached firmly? The external drive has been pre-loaded with the appropriate software? The external drive was attached before the computer was on? The external drive is turned on? Suppose that you have a "solid" failure. When considering replacement of a PC's power supply.
A customer attached an external drive to his notebook computer but the computer is not recognizing it. Partition hard disk After displaying the directory of a floppy disk. Voltage and ampere rating Size and shape. You remove the drive in question and install it into your test system. The contents of the original floppy continues to display regardless of the director requests on the other floppies placed in the drive.
You should next replace the what? Floppy drive ribbon cable During the A: System board boot process. A keyboard locks up intermittently even when replaced with a new keyboard. A second bad keyboard What questions could be asked to determine if a problem is software or hardware related?
Does the computer BEEP during the boot phase? Did peripheral devices initialize. What should you do after turning the power off? Replace the indicated parts. The least likely cause of the problem is: System RAM problem After doing a low-level format. The monitor power LED is 'on' but the monitor screen is completely dark. SYS gives you any kind of error during startup.
This usually means what? Bad RAM Memory addresses located in the first K of memory are known as? Conventional Memory XMS Extended Which FRU A: SCSI Host adapter can be considered both an input and output device? Bad motherboard What is the maximum number of floppy drives you can have on any one PC? When configuring a new network interface card for installation.
Keyboard controller is the chip used for? Unbox it and examine it for physical damage. Can you use a standard multimeter for measuring a monitors high voltage output? Should a Computer technician attempt to open a power supply in order to repair it?
SYS When not in use. When measuring AC Alternating Current with a multimeter. In their protective sleeves Secondary Hard Drive Controller The TWO primary A: If you have a device using IRQ2. IRQ9 System A: Firmware large software is stored the on reserved non-volatile memory memory chips ROM area? In a bit environment. Do Surge Suppressors offer really good protection for computer equipment?
If you check a good 4 amp fuse with the ohmmeter set at 20 what reading would you get? All devices have unique IDs. Bad video controller At what location on A: Cylinder 0. How would you fix this? Back it up and then perform a low-level format.
Toner A: Negative particles have what type of charge? Which will cause more damage to your computer system components. When you have severe power problems. Sector 1 the hard drive will you find Master boot record? A customer complains his printer doesn't work but the light is on.
If your monitor is making a high pitched noise. IDE type If you have a laser printer connected to your PC. ESD Which components A: What is the first thing you should do to correct the problem? Make sure the printer is on-line. Denatured alcohol did memory would the could a you and clean computers computer a have?
What code is entered on the FAT table to designate the last cluster a file uses? FFFF COM1 After replacing a motherboard. If your monitor has random dots on it. Put them all back in their original slots. Which type of fire extinguisher would you use to fight a computer or electrical fire? Class C Ohms do you set Which is A: Toner Cartridge CMOS your the part of Volt-Ohm easiest the meter to component computer is in to most order to test a environmentally likely to be fuse?
If the digital multimeter is set for DC. Why would you never want to test computer circuits with a standard Ohmmeter? Ohmmeters provide their own current which may damage internal components. System Chassis is this not symbol typically represent? CMOS battery When replacing a power supply in a computer. Ohm and 20k. They face each other on the insides of the plugs. Video Card Which of the following devices can send and receive information from other devices?
Choose 2 A: Serial Port Parallel port What causes A: AC Outlet IRQ1 many is The The longer slot What speed would its external logic be running? Which device A: SCSI hard drives provides the fastest access to large video files?
When connecting two external SCSI hard disks to a computer. An unused SCSI address. A customer has one printer on LPT1 and wants to add another printer. To which port could it be connected? What is a type A: Disk check diagnostics of Which should you A: Alcohol-impregnated wipes preventive use for maintenance cleaning used on Mylar-protected a hard LCD drive? It is most important to keep hard drives and diskettes away from?
Magnetic devices Temperature extremes What questions would you ask to determine if the display is working? Is there a video cursor or action on the screen? Did the computer beep or chime? Is there high voltage static on the screen? Is the video display brightness and contrast turned up? VGA monitor would provide the highest level of performance? A multimeter can be use to perform tests on which of the following?
To test a capacitor. RAM Which device provides the What does the CPU A: Which would A: Controller board you have fastest access time? A pin female connector on the back of your computer will typically be? Parallel Port COM1 A: What is most likely the problem?
Phone line To clean A: All purpose cleaner the plastic Damp case of a PC you cloth would use? Which processor chip was introduced in and has