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Firewalls monitor traffic and block anything that appears to be dangerous or illegitimate.
Hardware firewalls protect the network.
Software firewalls protect individual devices.
Hardware firewalls are good for preventing DoS attacks.
There are specialist tools and techniques designed to help protect networks from these types of attacks. These include:
Encryption will turn data transmitted into a coded form that cannot be read.
HTTPS uses encryption for transmitting data over the web securely.
VPNs are also used to create an encrypted connection over the internet.
This prevents data accessed through sniffing being read.
A packet sniffer will inspect all data being transmitted over a network, even if not intended for you.
- WiFi = vulnerable
- Mobile broadband = not vulnerable
- Wired = difficult to connect to network
without being noticed.
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Data transmitted over a network can be vulnerable to eavesdropping.
Two techniques for this are:
A computer pretends to be another computer to gain access to services, such as private data.
A key tool in denial of service attacks.
All kinds of connection and networks are vulnerable, but easier on wireless due to ease of access.