Interview Questions.

Question 1. What Is Piggybacking In Context To Wi-fi?

Answer :

Piggybacking is a term which states that some thing that is driving at the again of some thing else to finish his/her purpose, similar to just like an idiom setting gun to any other’s shoulder and acting Hunting, so piggybacking is a term used to consult get entry to of a wi-fi internet connection by means of bringing one’s personal laptop within the range of another’s wi-fi connection, and the use of that provider with out the subscriber’s explicit permission or understanding. It is a legally and ethically controversial exercise, with laws that fluctuate in jurisdictions around the sector. Piggybacking is an unauthorized tapping into any other’s connection with a public application.

For e.G.- So piggybacking can take region like once I am gaining access to the wireless connection of my neighbour Wi-Fi without his/her understanding with the aid of hacking his static ip cope with, then it'd be feasible for me to access the Wi-Fi connection of others.

Question 2. What Are The Recommended Channels If You Are Setting Up Three Wlans And Want Minimum Interference Over There?

Answer :

There is a want of choosing the channels for putting in WLANs, to talk; all of the components of a Wi-Fi community should use the equal channel. In the Wi-Fi community in infrastructure mode (the usage of an get admission to factor), it depends on the channel set at the get right of entry to factor.
For better outcomes when the use of Wi-Fi, it's miles necessary to regulate the channel on the get right of entry to point in addition to configured at the customer, to take the least use channel in your neighbourhood.
To try this you can use software including NetStumbler, so as to list the neighbourhood Wi-Fi networks and channels used.
Note:- The channels maximum regularly used to choose one as free as viable.

So the advocated channels are as follows:-

Channel 1: 2.412 MHz
Channel 2: 2.417 MHz
Channel 3: 2.422 MHz
Channel four: 2.427 MHz
Channel 5: 2.432 MHz
Channel 6: 2.437 MHz

You can pick from those channels at the same time as setting up the WLANs.

Networking Interview Questions
Question 3. How To Crack Wi-fi Network, If You Are Using Wep (stressed out Equivalent Privacy) Password With Backtrack?

Answer :

The first line of protection of your Wi-Fi network is encryption, which encodes the information transmitted between your PC and your wireless router.
WEP abbreviates (Wireless Encryption Protocol). It is a less-cozy protocol than WPA (Wireless Protected Access). Since WEP is especially smooth to crack, so you have to use the identical shape on all devices to your community. If you have an older router that supports WEP handiest you’ll be nice most secure if you use 128-bit bit WEP keys but additionally test the manufacturer’s Web web site for a firmware replace to be able to upload WPA help.
Two of the maximum famous packages used for simply cracking the WEP key are Airsnort and Aircrack. Airsnort may be used with the .Dump files that Kismet presents; and Aircrack can be use with .Cap documents that Airodump gives.
Question 4. Differentiate Between Ad-hoc And Infrastructure Topology And Also Explain With Their Advantages And Disadvantages?

Answer :

Wireless networks normally work in one of two configurations: Ad-Hoc or Infrastructure.

Ad-Hoc is Latin that means “for this reason” so these are the networks which can be essentially created for some cause. So those are the institution of workstations which talk immediately witch every different to trade facts. An Ad-Hoc network is also known as as a peer to look community. 
         Here are a few advantages of an Ad-Hoc community are:-

The opportunities with Ad-Hoc community are quite endless.
 Ad-Hoc networks are simple to set up.
 Ad-Hoc networks are inexpensive.
 Ad-Hoc networks are fast.
         Disadvantages of an Ad-Hoc community are as follows:-

It is not able to get into the mainstream wired nearby vicinity community.
It desires extra generation to aid their reliability.
As the community will increase its speed slows down substantially.
In Infrastructure mode, community includes an get entry to factor when the wireless clients hook up with an get right of entry to factor, which in flip bridges to a network. Infrastructure network can pass data through a imperative data hub which can be both, hardware or software device on a pc. So underneath this gadgets in a wi-fi community are installation to speak thru an get right of entry to factor. 
         An infrastructure network permits you to:-

In this you do no longer ought to control over the direction your records takes.
Connect to a stressed out network.
Extend your wi-fi community’s range.
Utilize roaming potential.
         Disadvantages for Infrastructure community are:-

Use of more wi-fi access points.
This increase the value of imposing a wi-fi network answer.
Networking Tutorial
Question 5. How Do You Secure A Wireless Network?

Answer :

Key factors for securing a wi-fi community are as follows:-

Verify that your PC’s software firewall is grew to become on, and that Window’s record-sharing characteristic is off; it’s off by means of default in Window’s XP with Service Pack 2.
Never send bank passwords, credit card numbers, private e mail, or other touchy statistics until you’re certain you’re on relaxed site: Look for the lock icon in the backside-proper corner of your browser, as well as a URL inside the cope with bar that begins with https. Such web sites construct of their personal encryption.
Always turn your Wi-Fi radio off while you're not at a hotspot: Hackers can use it to create peer-to-peer Wi-Fi connections with your pc and get entry to it immediately.
For higher safety, recall signing up for a paid subscription to a hotspot network inclusive of Boingo or T-Mobile. Both corporations provide connection software that encrypts your sessions mechanically.
By accomplishing those key points you may comfortable wi-fi network up to an quantity.

Linux Interview Questions
Question 6. What Are Your Preferred Tools For Wardriving?

Answer :

Preferred equipment for WarDriving are as follows:-

Kismet- Kismet is a 802.11b wireless community sniffer. It is capable of sniffing using almost any wireless card supported in Linux.
Airsnort- is one of the first tools to come out coming across insecurity of wireless community. AirSnort is a wi-fi LAN (WLAN) tool which cracks encryption keys on 802.11b WEP networks. AirSnort operates by means of passively tracking transmissions, computing the encryption key whilst sufficient packets had been amassed.
WEPCrack is Perl primarily based tool. WEPCrack is a device that cracks 802.Eleven WEP encryption keys using the cutting-edge discovered weakness of RC4 key scheduling.
WaveStumbler is console based 802.Eleven community mapper for Linux. It reports the simple AP stuff like channel, WEP, ESSID, MAC and so forth.
Aircrack yet another WEP cracking tool for Linux courtesy via divine.
Question 7. How Can You Configure Wi-fi Network And What Are Wi-fi Protocols?

Answer :

Basically there are numerous standards of Wi-Fi inside the industry however some popular of them are 802.11a, 802.11b, 802.11g/n. With the help of these Wi-Fi protocols we will speak/engage the various devices at the rate of 5Ghz to 2.4Ghz dual band communication.
If we've Wi-Fi nic card so first of all we should deploy their drivers and after installation if we have Wi-Fi get admission to factor then we will see the signal power within the proper nook underneath just open that and discover the access point to connect, if access point is configured with the safety, kind the important thing to attach and revel in the carrier.
Wi-Fi is technically known as the 802.11 protocol. Over time, Wi-Fi has progressed, giving upward push to unique versions of the protocol.
802.11a – This version operates at 54Mbps. It is considered as the fave wi-fi LAN protocol for IP telephony.

Linux Tutorial Telecommunication Project Management Interview Questions
Question eight. How Is Uwb (extremely-wideband) Different From Bluetooth, Firewire And Wi-fi?

Answer :

UWB is Radio Frequency era that transmits binary information, using low power and quick period impulses over a extensive spectrum of frequencies. It delivers data over 15 to one hundred meters and does no longer require a committed radio frequency. For example, a UWB signal focused at 5GHz normally extends across 4GHz and 6GHz. At longer distances, UWB statistics prices drop extensively.
Bluetooth:- The key difference amongst UWB and Bluetooth are of variety, electricity, consumption and meant use. It is largely supposed for short distances as much as (10m). It is low power ingesting than UWB.
Since FireWire is meant to supply excessive pace, it is also designed to work with high strength drain offerings. It consequently can provide a great deal greater power to the devices that connect with it. It can supply up to 60 watts of electricity. So the simplest distinction here is of strength it makes use of extra energy than UWB.
Wi-Fi in reality wasn’t constructed to move audio and video, it was constructed for statistics visitors wherein if there’s delay, whilst UWB is higher appropriate for multimedia for more than one motives, i.E. For starters, it’s throughput for surpasses that of Wi-Fi.
Question nine. Who Are The Providers And What Are The Assets Available For Wireless?

Answer :

Some of the providers for wireless are as follows:-

a) Wireless Internet- Nationwide Coverage Unlimited
b) Faster Internet on Mobile
c) New 3G BlackBerry
d) Aircel Pocket Internet
e) Reliance 3G Online Offer
f) Cisco Managed Switches

Brand property are available here for wi-fi, brand assets also can be carried out to m-branding. In unique, three of the belongings may be focused without delay for improvement with the m-branding strategies that are to be had nowadays. These are emblem attention, emblem associations and brand loyalty.

CWNA (Certified Wireless Network Administrator) Interview Questions
Question 10. Wireless Networking, Or Wi-fi, Can Be Used To Connect Computers In A Home, And Many Cities Are Using Technologies To Offer Free Or Low Cost Internet Access To Residents, What Is Another Name For Wi-fi?

Answer :

IEEE 802.11 is the professional name for WIFI wi-fi specification. It is composed of greater than 20 different standards (802.11a, 802.11b, and so on), every of that have their very own defining traits. Since now not all requirements operate at the identical frequency, no longer all 802.Eleven gadgets are compliant with one another, so make sure to don't forget the compatibility when making your purchasing selection. So this is an alternative call for Wi-Fi which suits all of the homes of the Wi-Fi and functioning as properly.
Wireless networking hardware requires the usage of underlying era that deals with radio frequencies as well as information transmission. The maximum widely used widespread is 802.11 produced with the aid of the Institute of Electrical and Electronic Engineers (IEEE). This is a widespread defining all components of Radio Frequency Wireless networking.
Unix/Linux Tutorial
Question eleven. Can I Mix Wireless Equipments From Different Vendors, Elaborate On It?

Answer :

You can mix wi-fi equipments from one-of-a-kind companies, but the recommendation is which you should decide on handiest prescribed providers, because most wi-fi networking hardware companies help the 802.11 wellknown they could inter function. However, we suggest verification as the same old is a fairly recent one, and does specify  exclusive techniques for wireless communications; Frequency Hopping (FH) and Direct Sequence Spread Spectrum (DSSS or DS), which aren't interoperable.
When shopping wireless networking hardware from separate companies make sure to reap ensures from the carriers that the hardware will interoperate and follows the standards.
Within a short time we anticipate all new wireless cards, like ethernet cards, to end up inexpensive, ubiquitous and definitely interoperable.
Also of be aware is that the modern day version of the same old defines 11mbps and 5.5mbps networking, with assist for the older preferred 1mbps and 2mbps speeds. This affords a few compatibility with specific or older system. Note that this new widespread covers DS-type Networks, now not FH sorts.
Software get right of entry to points consisting of InterGate which uses the wireless interface of the host pc need to haven't any compatibility problems with 1/3 birthday party wi-fi hardware, so long as standards are followed. Typically wireless hardware is diagnosed to the software as a community interface, and consequently may be used within the identical manner as any other network card. So you may choose them from unique carriers but keeping this stuff in thoughts and then pass ahead.
Bluetooth generation Interview Questions
Question 12. If My Computer Is Connected To Wireless Lan, Can It Communicate With Computer On Wired Lan As Well?

Answer :

To do this you'll need a few type of bridge among the wi-fi and stressed community. This may be achieved either with a hardware get entry to point or a software program get entry to factor. Hardware get entry to points are available with numerous styles of community interfaces, inclusive of Ethernet or Token Ring, however typically require greater hardware to be purchased if your networking requirements trade.
If networking necessities pass beyond simply interconnecting a wired network community to a small wi-fi network, a software get entry to point can be the quality answer.
A software program access point does now not limit the kind or wide variety of network interfaces you use. It may allow large flexibility in providing get right of entry to to one-of-a-kind network types, along with extraordinary styles of Ethernet, Wireless and Token Ring networks. Such connections are most effective constrained via the variety of slots or interfaces in the computer used for this venture.
Further to this the software program get admission to factor can also encompass big additional features which include shared Internet get admission to, net caching or content filtering, imparting widespread blessings to customers and administrators.
Networking Interview Questions
Question 13. Is It True That Wireless Networking Is Only Good For Laptop Computer?

Answer :

Although wi-fi networking offers apparent advantages to users of laptops who flow from area to region during the day, there are benefits for customers of fixed role computer systems as properly:
So this is not such that wireless networking is simplest appropriate for pc computers but on preference basis it were given greater than fixed positions, as laptop computers are portable, bendy, ease to use and flow.
Many schools and organizations have improper building layouts or partitions that cannot be wired for diverse reasons making it tough or impossible to build a stressed out network. Wireless networking in these environments is a completely cost powerful opportunity also providing destiny flexibility.
In instances in which a small quantity of computers are separated from a prime community a wi-fi link can be more fee effective than community cabling although the latter is flawlessly feasible.
Temporary wireless LANs can effortlessly be created for exhibitions, school or enterprise initiatives, all without any trailing cabling.
LTE Tutorial
Question 14. What Is Wi-fi Technology And Over Which Frequency Band It Operates?

Answer :

Wi-Fi technology is a technology used for transmitting a sign using the 802.11 specifications works lots like it does with a fundamental Ethernet hub: They’re each two-way types of conversation, and that they each use the identical frequency to both transmit and get hold of, regularly mentioned a half-duplex.

WLANs used radio frequencies (RFs) which might be radiated into the air from an antenna that creates radio waves. These waves can be absorbed, refracted, or reflected by using partitions, water, and metallic surfaces, ensuing in low signal energy. So because of this vulnerability to surrounding environmental factors, it’s pretty apparent that wire-much less will in no way provide us the equal robustness as a wired community can, however that still doesn’t mean we’re no longer going to use or run the wi-fi or Wi-Fi.

Question 15. What Are The Different Wi-fi Generations And Also Explain Any One?

Answer :

The IEEE 802.Eleven era is virtually handiest the earliest preferred, allowing 1-2 Mbps of bandwidth. Amendments have be made to the original preferred if you want to optimize bandwidth (those include the 802.11a, 802.11b and 802.11g requirements, which might be also referred to as 802.Eleven bodily requirements) or to higher specify additives so that you can make sure advanced safety or compatibility.

Name of Generation- 802.11a

Name- WiFi5

Description- The 802.11a fashionable (known as Wi-Fi five) allows higher bandwidth (fifty four Mbps most throughput, 30 Mbps in exercise). The 802.11a standard offers 8 radio channels inside the five GHz frequency band.

Unix/Linux Interview Questions
Question sixteen. What Is The Difference Between Wifi And Mifi?

Answer :

Wifi presents internet connectivity using wifi hotspots whilst mifi affords connectivity whilst the gadgets are shifting.

Telecom Billing Tutorial
Question 17. Will I Need To Have An Account With A Wi-fi Service Provider?

Answer :

Generally, no. You should be able to join up with the provider on the place. Many companies will show instructions whilst browser software program opens on a WiFi-enabled computer. If you do not have an account, truly begin your pc and make sure your Wi Fi card is plugged on. Then, open a browser.

LTE Interview Questions
Question 18. Can You Please Explain The Difference Between Ad-hoc And Infrastructure Topology?

Answer :

Wireless networks generally work in one of  configurations: Ad-Hoc or Infrastructure.

Ad-Hoc is Latin meaning "for this purpose" so those are the networks which are basically created for some reason. So those are the group of workstations which communicate at once witch every other to change facts. An Ad-Hoc network is likewise referred to as as a peer to look community.

In Infrastructure mode, community includes an get right of entry to factor whilst the wireless customers hook up with an get admission to factor, which in flip bridges to a network. Infrastructure network can bypass facts thru a principal statistics hub which may be each, hardware or software tool on a laptop. So beneath this gadgets in a wireless network are installation to speak via an access factor.

Linux Interview Questions
Question 19. How Can I Use Wi Fi?

Answer :

You should be using a laptop or PDA that has Wi Fi connectivity already running. Most transportable computers can add Wi Fi the usage of an adapter that plugs right into a PC card slot or USB port.

Question 20. What Are The Disadvantages Of Infrastructure Network?

Answer :

Use of more wi-fi get right of entry to points.
This increase the value of imposing a wi-fi network solution.
Telecom Billing Interview Questions
Question 21. What Is A Wi Fi Hotspot?

Answer :

A Wi Fi hotspot is defined as any vicinity in which 802.Eleven (wi-fi) technology both exists and is to be had to be used to purchasers. In a few instances the wi-fi get entry to is loose, and in others, wireless providers charge for Wi Fi utilization. Generally, the most not unusual usage of Wi Fi generation is for computer users to gain Internet get right of entry to in places which includes airports, espresso shops, and so forth, in which Wi Fi era may be used to help purchasers of their pursuit of work-primarily based or leisure Internet utilization.

Question 22. What Is Uwb (ultra-wideband)?

Answer :

UWB is Radio Frequency generation that transmits binary data, the usage of low power and quick duration impulses over a huge spectrum of frequencies. It can provide records over 15 to one hundred meters and does not require a dedicated radio frequency. For example, a UWB sign targeted at 5GHz typically extends across 4GHz and 6GHz. At longer distances, UWB statistics charges drop drastically.

Question 23. Is My Data And E-mail Secure At A Wi-fi?

Answer :

You need to by no means behavior unsecured transactions that consist of any account or password statistics over public hotspots the usage of FTP, e mail, or the Web. Try to apply SSL for e-mail (POP and SMTP), or study your electronic mail with a Web browser the use of an SSL connection. Ask your ISP if they offer SSL cozy web-based totally e mail.

VLAN Interview Questions
Question 24. How Uwb (ultra-wideband) Is Different From Firewire?

Answer :

Since FireWire is meant to supply excessive velocity, it's also designed to work with high electricity drain services. It consequently can provide a lot more power to the devices that connect with it. It can supply as much as 60 watts of strength. So the best distinction right here is of strength it uses greater energy than UWB.

Telecommunication Project Management Interview Questions
Question 25. What Can I Do At A Wi-fi?

Answer :

The Wi-Fi wireless broadband connection permits you to do anything you'd do from domestic or the office. You can surf the Web, check your email, connect to your Corporate community (make certain to use a cozy VPN connection), make free Voice over IP telephone calls, play on-line video games, update your weblog, and IM with your friends. If you simply have a modem dial-up account at home you will probably grow to be spending more time at the Wi-Fi after you see how a whole lot faster it's far.

Question 26. How Uwb (extremely-wideband) Is Different From Wi-fi?

Answer :

Wi-Fi in reality wasn't built to move audio and video, it become constructed for facts site visitors where if there's postpone, whilst UWB is higher applicable for multimedia for more than one motives, i.E. For starters, it is throughput for surpasses that of Wi-Fi.

TCP/IP Interview Questions
Question 27. What Does Free Wi-fi Really Mean?

Answer :

As the provision of Free Wi-Fi places keeps to unfold I notion it might be appropriate to study what Free would possibly imply in unique forms of locations. The places indexed within the Wi-Fi Directory all offer some kind of Free Wi-Fi access to the general public, but from time to time there may be get entry to requirements/restrictions which can be unique to a selected kind of vicinity, and therefore the access, even though unfastened, might not be to be had to every person/all people. While having access to the Free Wi-Fi in sure places you'll be spending cash to pay for a Hotel room or space in a RV Resort or for coffee in a restaurant, and so forth. So the subsequent data must help to clarify what Free Wi-Fi really way in one of a kind places.

CWNA (Certified Wireless Network Administrator) Interview Questions
Question 28. What Assets Are Available For Wireless?

Answer :

Brand property are available here for wireless, logo assets also can be carried out to m-branding. In precise, 3 of the belongings may be centered at once for improvement with the m-branding methods which might be to be had these days. These are logo focus, brand associations and emblem loyalty.

Question 29. Is Wi Fi The Same As Bluetooth?

Answer :

No. While each are wi-fi era terms, Bluetooth generation lives under the IEEE protocol 802.15.1, whilst Wi Fi falls under the 802.Eleven specification. What this means for purchasers is that home equipment the usage of Wi Fi generation and those the use of Bluetooth era are not interoperable.

Bluetooth and Wi Fi are one-of-a-kind in numerous methods, and aren't always in opposition. Wi Fi era boasts faster records switch speeds and range, making it an awesome substitute for Ethernet (802.Three) structures, while Bluetooth calls for less electricity and is consequently extra prominent in small appliances, consisting of PDAs.

LTE Rf Planning Optimization For 4g Interview Questions
Question 30. Suppose If You Are Setting Up Three Wlans And Want Minimum Interference Over There Then What Are Recommended Channels?

Answer :

There is a need of selecting the channels for putting in place WLANs, to speak? all the additives of a WiFi community must use the same channel. In the WiFi network in infrastructure mode (the usage of an get admission to factor), it relies upon on the channel set at the get admission to factor.

For higher results whilst the usage of WiFi, it is essential to regulate the channel at the get right of entry to factor in addition to configured at the purchaser, to take the least use channel in your community.

To do this you may use software program which include NetStumbler, on the way to listing the neighborhood WiFi networks and channels used.