Firewalls act like the security guards of a network, analyzing all attempts to connect to systems on a network and determining whether the request should be allowed or denied according to the organization’s security policy. Learn the basic functioning of a firewall, including the implicit deny principle.
- [Narrator] If routers and switches are the connectivity…building blocks of a network,…firewalls are the security work horses.…Firewalls act like the security guards of a network,…analyzing all attempts to connect to systems on the network,…and determining whether those requests should be…allowed or denied, according to…the organization's security policy.…Firewalls often sit at the network perimeter,…in between an organization's routers and the Internet.…From this network location, they can easily see all…inbound and outbound connections.…
Traffic on the internal network may flow between…trusted systems unimpeded,…but anything crossing the perimeter to or from the Internet…must be evaluated by the firewall.…Firewalls often connect three networks together,…the Internet, an internal network,…and a special purpose network known as…the Demilitarized Zone, or DMZ.…The DMZ contains systems that must accept…direct connections from the outside world,…such as public web servers.…The DMZ isolates those systems because…
Learn about communication and networking best practices, including TCP/IP networking, network security devices, and secure network design and management. Instructor and cybersecurity expert Mike Chapple also includes coverage of converged protocols, network encryption, and wireless networking. You can find Mike's companion study books for this series at the Sybex test prep site and review the complete CISSP Body of Knowledge at https://www.isc2.org/cissp-domains/default.aspx.
- IP addressing
- Switches and routers
- Content distribution networks
- Designing secure networks
- Specialized networking
- Managing secure networks
- Working with virtualized networks like SDNs
- Detecting and preventing network attaches
- Transport encryption
- Wireless networking
- Host security
Skill Level Advanced
CISSP Cert Prep: 2 Asset Securitywith Mike Chapple58m 11s Advanced
1. TCP/IP Networking
2. Network Security Devices
3. Designing Secure Networks
4. Specialized Networking
5. Secure Network Management
6. Virtualized Networks
Port isolation1m 47s
7. Network Attacks
8. Transport Encryption
9. Wireless Networking
10. Host Security
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