Network and Communications Security

5 minutes 5 Questions

Network and Communications Security focuses on the protection of an organization's data as it is transmitted between devices, systems, and applications. This includes the safeguarding of communication networks, protocols, and infrastructure used to process, store, and transmit sensitive information. The objective is to prevent unauthorized access, tampering, interception, and disruption of data during transmission or while at rest. Various security measures can be employed to achieve this, such as encryption, virtual private networks (VPNs), intrusion detection systems (IDS), firewalls, data loss prevention (DLP) tools, and network access control (NAC) solutions. Ensuring robust network and communications security is vital for maintaining the confidentiality, integrity, and availability of an organization's information assets and services.

Guide: Network and Communications Security for CISSP

Understanding Network and Communications Security:
Network and Communications Security is a critical domain in the CISSP certification. It encompasses the policies, procedures, and measures put in place to protect, monitor, and manage the network and communication systems against security breaches or unauthorized intrusion. This can include network architecture, protocols, security components, and wireless communications.

Importance of Network and Communications Security:
The importance of Network and Communications Security cannot be overstated. As organizations are heavily reliant on networks and communications for their daily operations, any unauthorized access or disruption could lead to severe consequences like loss of sensitive data, financial loss, and damage to reputation.

How it works:
Network and Communications Security involves a multi-layered approach. It starts from the physical protection of network devices to implementing secure communication protocols and conducting regular security auditing and monitoring.

Exam Tips: Answering Questions on Network and Communications Security:
Understanding various network and communication concepts, their application, weaknesses, and countermeasures are the keys to answering exam questions. Here are some tips:
- Understand the principles of secure network architecture.
- Familiarize yourself with common network and communication protocols, their weaknesses, and associated counter-measures.
- Know the various types of network attacks and how to prevent them.
- Practice situational questions related to Network and Communications Security.

Test mode:

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Question 1

An organization has found that their staff are experiencing slow network performance while streaming content and downloading large files. What solution can the network administrator implement to mitigate this issue?

Install a new Ethernet switch Disable streaming content Implement Quality of Service (QoS) settings Assign static IP addresses

Correct Answer: Implement Quality of Service (QoS) settings

Quality of Service (QoS) settings can be configured to prioritize specific types of traffic to improve performance. Disabling streaming content may not be practical or effective, assigning static IP addresses has no impact on performance, and while installing a new switch or increasing bandwidth could help, it does not prioritize important traffic. Network segmentation can improve security but may not provide a solution to performance problems.

Question 2

An organization is concerned about unauthorized individuals gaining access to its network resources via an open wireless network. Which of the following is the best solution?

Disable SSID broadcast Implement WEP encryption Implement WPA3 with strong passphrase Enable MAC address filtering

Correct Answer: Implement WPA3 with strong passphrase

Using WPA3 with a strong passphrase provides the highest level of security for wireless networks. MAC address filtering is easily bypassed, disabling SSID broadcast does not prevent joining the network, WEP encryption is considered weak and easily broken, an open network with firewall rules does not secure wireless communication, and reducing power does not improve security.

Question 3

An organization has recently experienced unauthorized access to its servers through open network shares. Which of the following solutions can be employed to best mitigate data loss and unauthorized access?

Enable password protected sharing Utilize multiple SSIDs Disable open network shares Implement network access control with proper permissions

Correct Answer: Implement network access control with proper permissions

Implementing network access control with proper permissions provides granular control over which users have access to specific network resources. Password protected sharing is less secure than proper access control, disabling open network shares may not be practical, multiple SSIDs can help segregate wireless networks but do not directly secure network shares, and MAC address restrictions and disabling file-download capabilities do not affect unauthorized access to network shares.

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