About Lesson
Network Security Basic
Identify some basic security threats and solution for all networks.
There are two main types of network security that must be addressed:
Network infrastructure security
- Physical security of network devices
- Preventing unauthorized access to the devices
Information Security
- Protection of the information or data transmitted over the network
Three goals of network security:
- Confidentiality – only intended recipients can read the data
- Integrity – assurance that the data has not be altered with during transmission
- Availability – assurance of timely and reliable access to data for authorized users
Security Threats
- Network security is an integral part of networking regardless of the size of the network. The network security that is implemented must take into account the environment while securing the data, but still allowing for quality of service that is expected of the network. Securing a network involves many protocols, technologies, devices, tools, and techniques in order to secure data and mitigate threats. Threat vectors might be external or internal.
External Threats:
- Viruses, worms, and Trojan horses
- Spyware and adware
- Zero-day attacks
- Threat Actor attacks
- Denial of service attacks
- Data interception and theft
- Identity theft
Internal Threats:
- lost or stolen devices
- accidental misuse by employees
- malicious employees
Security Solutions
- Security must be implemented in multiple layers using more than one security solution. Network security components for home or small office network:
- Antivirus and antispyware software should be installed on end devices.
- Firewall filtering used to block unauthorized access to the network.
- Larger networks have additional security requirements:
- Dedicated firewall system
- Access control lists (ACL)
- Intrusion prevention systems (IPS)
- Virtual private networks (VPN)
Other related topics
| Topic Title | Topic Objective |
| Network Components | Explain how host and network devices are used. |
| Network Representations and Topologies | Explain network representations and how they are used in network topologies. |
| Common Types of Networks | Compare the characteristics of common types of networks. |
| Internet Connections | Explain how LANs and WANs interconnect to the internet. |
| Reliable Networks | Describe the four basic requirements of a reliable network. |
| Network Trends | Explain how trends such as BYOD, online collaboration, video, and cloud computing are changing the way we interact. |
| Network Security Basic | Identify some basic security threats and solution for all networks. |
Other useful information
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