The article explains why it is not possible to prevent a DDOS attack using a packet filter firewall. In the above diagram, an organization has a Web server, which is deployed behind a packet filter firewall. The Web server is targetted with a DDOS based TCP syn flood attack. A packet filter firewall, has...
The article explains the communication between a dhcp client and server on different subnets. In the above diagram ,the dhcp client and server is setup on different networks. A client requests a DHCP address from the DHCP server using a DHCP discover packet. This packet is broadcast in nature. So when the client in...
Requirement An ISP engineer has setup a home wireless network. The engineer has setup the necessary configurations and the home user has validated that the network is working. Later, the home user would like to know, if the security of his network can be breached by a third party. An appropriate solution has to...
Networking requirement An organization is looking for a networking software solution by which the internet bandwidth of users on a network can be controlled. The websites which the users access, along with the access restrictions to media files and internet control is required. The software should have the capacity to limit daily internet usage...
VLAN, which stands for Virtual LAN, is a technology which is used for creating multiple LAN networks on a single physical switch. The technology is supported on LAN switches. Let’s take an example where there is a requirement to create two LAN networks. For this purpose, two switches are required. Computers belonging to LAN...