Figure 5.18: Network connection model According to this model, for each Internet connection method, the Proxy server uses 02 interfaces as follows: - Internet connection via voice line via PSTN network: 01 communicates with the internal network via network card. 01 communicates with the ...
1.1.1.2. System security history There are several events that mark malicious activities on the network, which give rise to system security requirements as follows: - 1988: A program appeared on the Internet that replicated itself on all computers on the Internet. These programs were called worms. ...
Subnetting In many cases, a network can be divided into multiple subnets, in which case subnetid domains can be added to identify the subnets. The subnetid domain is derived from the hostid domain, specifically for the 3 classes A, B, C as follows: Netid Subnet id hostid Class A Netid Subnet id ...
