Wednesday, April 16, 2014

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Thursday, February 27, 2014

Top Select Interview Questions for Network Engineer's!!!

Q31. What is Mail Gateway?
Ans. It is a system that performs a protocol translation between different electronic mail deliveryprotocols.

Q32. What is wide-mouth frog?
Ans. Wide-mouth frog is the simplest known key distribution center (KDC) authentication protocol.

Q33. What are Digrams and Trigrams?
Ans. The most common two letter combinations are called as digrams. e.g. th, in, er, re and an. The most common three letter combinations are called as trigrams. e.g. the, ing, and, and ion.

Q34. What is silly window syndrome?
Ans. It is a problem that can ruin TCP performance. This problem occurs when data are passed to the sending TCP entity in large blocks, but an interactive application on the receiving side reads 1 byte at a time.

Q35. What is region?
Ans. 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.

Don't forget to check our page for next set of Question's !!

Tuesday, February 25, 2014

Register Now !!! for Free Online Training DEMO !!!!

{CCIE, CCNP, CCNA,CCNA Security, Ethical Hacking, MCSE, LINUX, Exchange Server, Vmware}

Register via Below Link. :

Which IT Certification are you planning for in next three months?

1) CCNA.
2) CCNP. 
3) CCIE.
4) MCSE(Windows Server 2012).
6) RHCE.
8) VMware (vSphere 5.1) Certified Professional.

Friday, February 21, 2014

Which IT Certification are you currently holding??

1) CCNA.
2) CCNP. 
3) CCIE.
4) MCSE(Windows Server 2012).
6) RHCE.
8) VMware (vSphere 5.1) Certified Professional.

Ethical Hacking Tools for novice.......... Foot Printing Tools!!


Tuesday, February 18, 2014

Top Select Interview Questions for Network Engineer's!!

Q26. What is Gateway-to-Gateway protocol?
Ans. It is a protocol formerly used to exchange routing information between Internet core routers.

Q27. What is BGP (Border Gateway Protocol)?
Ans. It is a protocol used to advertise the set of networks that can be reached with in an autonomous system. BGP enables this information to be shared with the autonomous system. This is newer than EGP (Exterior Gateway Protocol).

Q28. What is autonomous system?
Ans. It is a collection of routers under the control of a single administrative authority and that uses a common Interior Gateway Protocol.

Q29. What is EGP (Exterior Gateway Protocol)?
Ans. It is the protocol the routers in neighboring autonomous systems use to identify the set of networks that can be reached within or via each autonomous system.

Q30. What is IGP (Interior Gateway Protocol)?
Ans. It is any routing protocol used within an autonomous system.

Monday, February 17, 2014

Top Select Interview Questions for Network Engineer's!!

Q21. What is Proxy ARP?
Ans. It is using a router to answer ARP requests. This will be done when the originating host believes that a destination is local, when in fact is lies beyond router.

Q22. What is OSPF?
Ans. It is an Internet routing protocol that scales well, can route traffic along multiple paths, and uses knowledge of an Internet’s topology to make accurate routing decisions.

Q23. What is Kerberos?
Ans. It is an authentication service developed at the Massachusetts Institute of Technology. Kerberos uses encryption to prevent intruders from discovering passwords and gaining unauthorized access to files.

Q24. What is a Multi-homed Host?
Ans. It is a host that has a multiple network interfaces and that requires multiple IP addressesis called as a Multi-homed Host.

Q25. What is NVT (Network Virtual Terminal)?
Ans. It is a set of rules defining a very simple virtual terminal interaction. The NVT is used in the start of a Telnet session.

(Please visit the page tomorrow for.. Next Set of Question's!!)

Saturday, February 15, 2014

Top Select Interview Questions for Network Engineer's!!!

Q16. What are the advantages and disadvantages of the three types of routing tables?
Ans. The three types of routing tables are fixed, dynamic, and fixed central. The 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. Usually a dynamic table causes the fewest problems for a network administrator, although the table’s contents can change without the administrator being aware of the change.

Q17. What is a characteristic of Store and Forward switches?
Ans. They read the entire frame and check CRC before forwarding.

Q18. What is source route?
Ans. It is a sequence of IP addresses identifying the route a datagram must follow. A source route may optionally be included in an IP datagram header.

Q19. What is RIP (Routing Information Protocol)?
Ans. It is a simple protocol used to exchange information between the routers.

Q20. What is SLIP (Serial Line Interface Protocol)?
Ans. It is a very simple protocol used for transmission of IP datagrams across a serial line.

Stay Tuned for more and next set of Questions !! 

Microsoft versus Windows!!!

Friday, February 14, 2014

Trouble-shooting a weak Wi-Fi Signal!!

Top Select Interview Questions for Network Engineers!!

Q11. BOOTP helps a diskless workstation boot. How does it get a message to the network looking for its IP address and the location of its operating system boot files ?
Ans. BOOTP sends a UDP message with a subnetwork broadcast address and waits for a reply from a server that gives it the IP address. 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.

Q12. What is a DNS resource record?
Ans. A 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. Resource records are maintained as ASCII files.

Q13. What protocol is used by DNS name servers?
Ans. DNS uses UDP for communication between servers. It is a better choice than TCP because of the improved speed a connectionless protocol offers. Of course, transmission reliability suffers with UDP.

Q14. What is the difference between interior and exterior neighbor gateways?
Ans. Interior gateways connect LANs of one organization, whereas exterior gateways connect the organization to the outside world.

Q15. What is the HELLO protocol used for?
Ans. The HELLO protocol uses time instead of distance to determine optimal routing. It is an alternative to the Routing Information Protocol.

What made present day computers possible!!

Thursday, February 13, 2014

New technique of uploading files!!

Top Select Interview Question for Network Engineer's

Q1. What are 10Base2, 10Base5 and 10BaseT Ethernet LANs?
Ans. 10Base2—An Ethernet term meaning a maximum transfer rate of 10 Megabits per second that uses baseband signaling, with a contiguous cable segment length of 100 meters and a maximum of 2 segments.

10Base5—An Ethernet term meaning a maximum transfer rate of 10 Megabits per second that uses baseband signaling, with 5 continuous segments not exceeding 100 meters per segment.

10BaseT—An Ethernet term meaning a maximum transfer rate of 10 Megabits per second that uses baseband signaling and twisted pair cabling.

Q2. What is the difference between an unspecified passive open and a fully specified passive open?
Ans. An unspecified passive open has the server waiting for a connection request from a client. A fully specified passive open has the server waiting for a connection from a specific client.

Q3. Explain the function of Transmission Control Block.
Ans. A TCB is a complex data structure that contains a considerable amount of information about each connection.

Q4. What is a Management Information Base (MIB)?
Ans. A Management Information Base is part of every SNMP-managed device. Each SNMP agent has the MIB database that contains information about the device’s status, its performance, connections, and configuration. The MIB is queried by SNMP.

Q5. What is anonymous FTP and why would you use it?
Ans. Anonymous FTP enables users to connect to a host without using a valid login and password. Usually, anonymous FTP uses a login called anonymous or guest, with the password usually requesting the user’s ID for tracking purposes only. Anonymous FTP is used to enable a large number of users to access files on the host without having to go to the trouble of setting up logins for them all. Anonymous FTP systems usually have strict controls over the areas an anonymous user can access.

Stay tuned for more & next set of questions!!

Wednesday, February 5, 2014

Problems With Virtual Traffic??

Trivia for the Day!!.. CCNA Security (640-554).

The Administrator wants to monitor the activities of User A on the router. What feature should the administrator use?

A. Authentication
B. Access Lists
C. Accounting
D. Authorization

Please check the post tomorrow for right answer.

Wednesday, January 29, 2014

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Tuesday, January 28, 2014

Trivia for the day!!.. MCSE (70-411).

Your network contains an Active Directory domain named The domain contains an organizational unit (OU) named IT and a OU named Sales.

All of the help desk user accounts are located in the IT OU. All of the sales user accounts are located in the Sales OU.

The Sales OU contains a global security group named G_Sales.The IT OU contains a global security group named G_HelpDesk.

You need to ensure that members of G_HelpDesk can perform the following tasks:

Reset the passwords of the sales users.

Force the sales users to change their password at their logon.

What should you do?

A. Run the Set-ADFinecrainedPasswordPolicy cmdlet and specify the -identity parameter.
B. Right-click the IT OU and select Delegate Control.
C. Right-click the Sales OU and select Delegate Control.
D. Run the Set-ADAccountPassword cmdlet and specify the -identity parameter.

Saturday, January 25, 2014

Network Engineer's Fitness Regime??

Trivia for the Day!!.. CCNA Security (650-554).

Which statement describes a result of securing the CISCO IOS image using the CISCO IOS image resilience feature?

A.The show version command does not show the Cisco IOS image file location.

B.The Cisco IOS image file is not visible in the output from the show flash command.

C.When the router boots up, the Cisco IOS image is loaded from a secured FTP location.

D.The running Cisco IOS image is encrypted and then automatically backed up to the NVRAM.

E.The running Cisco IOS image is encrypted and then automatically backed up to a TFTP server.

Check the page for correct answer.. tomorrow!! :)

Friday, January 24, 2014

Trivia for the day!!.. MCSE 70-411.

You have a server named Server1 that runs with Windows Server 2012. 

Server1 has the File Server Resource Manager role service installed.

Server1 has a folder named Folder1 that is used by the sales department.

You need to ensure that an email notification is sent to the sales manager when a File 

Screening Audit report is generated.

What should you configure on Server1?

A. A file screen exception.

B. A file group.

C. A storage report task.

D. A file screen.

(Check post the post for correct answer..tomorrow!) 

Thursday, January 23, 2014

Trivia for the day!!.. CCNA (200-120).

Q) Which routing method is most trusted by a router?
a. BGP
c. Static
d. RIP

Please check our page for the correct answer tomorrow!! 

Wednesday, January 22, 2014

Microsoft remotely deleted Tor-based 'Sefnit Botnet' from more than 2 Million Systems

Microsoft remotely deleted Tor Browser from more than 2 Million Systems
In October 2013, Microsoft adopted a silent, offensive method to tackle infection due to a Tor-based botnet malware called 'Sefnit'.
In an effort to takedown of the Sefnit botnet to protect windows users, Microsoft remotely removes the older versions of installed Tor Browser software and infection from 2 Million systems, even without the knowledge of the system's owner.

Last year in August, after Snowden revelations about the National Security Agency's (NSA) Spying programs, the Internet users were under fear of being spied. During the same time Tor Project leaders noticed almost 600% increase in the number of users over the anonymizing networks of Tor i.e. More than 600,000 users join Tor within few weeks.
In September, researchers identified the major reason of increased Tor users i.e. A Tor-based botnet called 'Sefnit malware', which was infecting millions of computers for click fraud and bitcoin mining.
To achieve the maximum number of infections, cyber criminals were using several ways to spread their botnet. On later investigation, Microsoft discovered some popular softwares like Browser Protector and FileScout, bundled with vulnerable version of Tor Browser & Sefnit components.
'The security problem lies in the fact that during a Sefnit component infection, the Tor client service is also silently installed in the background. Even after Sefnit is removed, unless specific care is taken, the Tor service will be left and still regularly connect to the Tor Network.'
Microsoft remotely uninstalled Tor software from computers to halt botnet
It was not practically possible for Microsoft or the Government to instruct each individual on 'How to remove this Malware', so finally Microsoft took the decision of remotely washing out the infections themselves. 
To clean infected machines, Microsoft began updating definitions for its antimalware apps.
"We modified our signatures to remove the Sefnit-added Tor client service. Signature and remediation are included in all Microsoft security software, including Microsoft Security Essentials, Windows Defender on Windows 8, Microsoft Safety Scanner, Microsoft System Center Endpoint Protection, and Windows Defender Offline." and later also in Malicious Software Removal Tool.
But why Tor Browser?
"Even after Sefnit is removed, unless specific care is taken, the Tor service will be left and still regularly connect to the Tor Network. This is a problem not only for the workload it applies to the Tor Network, but also for the security of these computers." Microsoft says.
So they removed it and to Justify their action, Microsoft points out several vulnerabilities in the Tor version bundled with Sefnit malware i.e. Tor version, that opens the user to attack through these known vulnerabilities.
"Tor is a good application used to anonymous traffic and usually poses no threat. Unfortunately, the version installed by Sefnit is v0.2.3.25 – and does not self-update. The latest Tor release builds at the time of writing is v0.2.4.20."
Tor Browser
May be this is the right way to neutralize the infections, but the Microsoft's action also clarifies the capability to remotely remove any software from your computer.
Source : THN

Thursday, January 16, 2014

Trivia for the day--CCNA (200-120).

Q)Which of these routing protocol would be used between Autonomous systems (Inter-AS)?
b. RIP
d. BGP 

Don't forget to check your answer tomorrow!!:P

Monday, January 13, 2014

Here you have another question guys..

Cisco (200-120)--Who all are going for it??

 2. Which of these is an exterior gateway protocol (EGP)?
 a. OSPF
 b. BGP
 c. RIP

 Answer you would know day after tomorrow..

Friday, January 10, 2014

Trivia for the day!!--CISCO (200-120)

Try to answer this question.. Let's see how many of you would come up with the right option.Would post the answer tomorrow.

Q) What routing protocol uses cost as its metric?
a. RIP
d. BGP

Time to ponder!!

Saturday, January 4, 2014

Are you smart enough to solve this?? :P

Beside the window there's a table, on the table there are 12 candles light up.

Wind blows off  3 candles , later on 5 more candles blow off.

How many candles would be left on the table?