Networks and Security Interview Questions

Hi,If one host in LAN does not connect to LAN check if the 1)Domain Name is entered correctly as it is case sensitive .2)Check If Lan Card is working properly.3)Check if the cable is clamped properly....

There can be more than one reason for the host not connecting to the network. Check the following:-1. Network adapter drivers (remove the driver and reinstall)2. UTP cable from the swit...

This is kind of broad question......But generally it can be said as securing computer or any technical equipments (like pritners, smartphones & etc....) which is connected to the organizational ne...

If both the segments are working on same network then a bridge can be used, if they are running on a different network to have the connectivity we need to use a router.

Domain controller is a system where Active Directory is installed in which every object is stored & having roll is to provide the access of services to client who are request to access the services over domain.

On Windows Server Systems, a domain controller (DC) is a server that responds to security authentication requests (logging in, checking permissions, etc.) within the Windows Server domain.

ARP means Address resolution protocal.it operates in datalink layer.

When the device knows the ip address of the remote device but not its mac id then this Arp is used.

ARP stands for Address Resolution Protocol. Application working at the Application Layer uses IP address (Logical Address) for communication and at the Datalink layer the addressing is based on MAC ad...

The general idea is finding 3 numbers E,N, M so that one of them is public and the other private. and it is near impossible to find them out.E,N are public known and M is privateFor Encryption:Encript...

Routing Protocol: This process includes the exchanges and analysis of routing informaion,each router chooses the best route to each subnet path selaection.  Ex: rip, Eigrp, ospf, bgpRouted Protoc...

Routing protocols are one which assigns the route by seeing all the routers in the network. They distribute routing information to all the routers.
Ex: BGP, IGRP.

 Routed protocols are those which are sent over the network which is routed already. Ex: IP is a routed protocol.

Confidentiality, Integrity and Availability

Confidentiality, Integrity and Availability

100 Mbps to 300 Mbps

Firstly, the TFTP server must have a network connection to the router, and must be able to ping the IP address of the router targeted for a TFTP software upgrade. To achieve this, the router interface...

Use TFTPdnld command at the rommon mode after that follow the instructions of the said command.

Note you must have a copy of the IOS in a TFTP Server is support this.

Thanks.

NAT i nothing but Network address translation. to transfer the inside local Private address into the outside public address(Internet.Static NAT : in this one private insde local address need one outsi...

VPN (Virtule Private Network)
It is mainly used to connect to local domain of user through the internet and we can work as if we are in the company and disadvantage is it needs external internet connection.

VPN gives extremely secure connections between private networks linked through the Internet. It allows your remote computer(s) to act as though they were on the same secure, local (USU) network. Allow...

Both RARP and IARP belong to Datalink layer protocols.

ARP : Address Resolution Protocol,It resolves IP Address into MAC Address
RARP : Reverse Address Resolution Protocol, It Resolves MAC Address intp IP Address.

Some network hosts will not have internal disk to store TCP/IP configuration data such as IP address, gateway.....etc.  BOOTP sends IP addresses and other configuration data to hosts that broadca...

Trasmission through ethernet cable would be more secure as it would be difficult for intruders to access the user resources. Wireless medium is the unsafe of all as it could be easily hacked without a good encryption like WPA personel or WPA 2 personel. 

Out of Wire, fiber and wireless. On a very high level, it could be said that fiber is the most secure as it is the hardest to tap. Cable is a little more secure, as physical access is not hard to tap and sniff the passing traffic.

APIPA is auto assign to the PC if there is not connection to DHCP Server. If both PCs is configured using DHCP, there will not be IP conflicts and both IP will be assigned in the range of IP that is configured in DHCP Server and both IPs will be in same subnet.

A hub is a layer 1 (physical) device because it does not use any part of the packet header to direct the packet to the right destination, it just broadcasts to all connected computers.

netstat -anb

-a is for show all
-n is for show numbers
-b is for show PID i.e Process IDs

netstat -n
this command will show u the current used port number

CISCO pix firewall security is statefull firewall. It uses ASA Technology

RARP has been best explained by Shridhar... just imagine how a diskless machine will boot from network...this is the best example

by the way, explanation of Shridhar regarding ARP cannot be termed the best to understand (RARP explanation is the best though)

Hi,ARP -Meaning of ARP – "Address Resolution Protocol", is used to map ip Network addresses to the hardware (Media Access Control sub layer) addresses used by the data link protocol. The ARP...