CISSP CORE-CONCEPTS -Domain-4 | The Ultimate CISSP Course

Explore OSI versus TCP/IP models, encapsulation, and secure design principles in networking, and apply DNS, DHCP, and LDAP concepts for secure directory and name resolution.

Explains OSI layers from physical to application, detailing transport layer end-to-end guarantees with sequencing and CRC, network layer routing, ARP spoofing, VLAN hopping, and NAT/PAT and firewall considerations.

Explore IPv4 and IPv6 differences, including address space, NAT and PAT roles, private RFC 1918 ranges, anycast benefits, and dual stack, tunneling, and header translation for IPv4–IPv6 communication.

Explore secure protocols like SSL/TLS and SSH 2.0, focusing on key exchange, authentication, certificate validation, and IPsec transport and tunnel modes with MAC/HMAC integrity.

Examine multilayer protocols across osi layers, defense in depth with packet filtering and web application firewalls, and note tcp/ip hijacking and dnp three is open and not secure by default.

Explore converged network protocols that unify data, voice, and video on a single IP network, reducing costs, and cover iSCSI, FCoE, InfiniBand over Ethernet, and Compute Express Link.

Explore transport architecture by examining physical and logical topologies, including hybrid, star, tree, and bus, and understand how collision domains, fault tolerance, and scalability influence network security and availability.

Explore how software-defined networking centralizes control for improved security and visibility, with network function virtualization and abstraction; compare cut-through versus store-and-forward switching and the roles of circuit and packet switching.

Explore performance metrics in networking, including bandwidth, latency, jitter, and signal-to-noise ratio, and distinguish real-time versus bulk data transfer to understand holistic quality of service.

Explore physical segmentation in networks, including in-band, out-of-band, and air-gap models; see how dedicated resources and isolation prevent lateral movement and boost security and performance.

Explore logical segmentation concepts such as virtual routing and forwarding, VLANs, and virtual domains. Learn how routing tables are isolated to prevent poisoning and enable inter-VLAN communication.

Explores micro-segmentation and network overlays, including vxlan, vlan, and zero trust, to prevent lateral movement and enable fine-grained security policies.

Explains how micro-segmentation with distributed firewalls minimizes lateral movement and enables independent security policies per segment. Highlights zero-trust oriented internal segmentation and granular access controls based on identity and application.

Explore wireless networks from pan to wan and analyze security protocols such as wep, wpa2, wpa3, and concepts like tkip and rc4, including per-packet keying.

Explore cellular and mobile networks, including base stations, cells, and handover, and examine security challenges such as rogue towers, IMSI catchers, SIM cloning, and end-to-end versus GSM encryption.

Content delivery networks boost performance and availability by caching content near end users, while distributing traffic to mitigate DDoS; security is not their primary goal.

Explore software defined networking (sdn) and the decoupling of control and management planes from the data plane, highlighting centralized visibility, virtualization, and single-point-of-failure risks.

Explore virtual private cloud (VPC) concepts in a public cloud, including isolation, security groups as instance firewalls, and encryption. Learn how VPC peering or VPN interconnects regional VPCs.

Examine how to operate and maintain a resilient network infrastructure with emphasis on power redundancy, UPS design, and generator readiness to minimize downtime.

Explore network access control basics, including IEEE 802.1X, layer 2 operation (and touches layer 3), device authentication and health checks, and post-admission monitoring.

Enhance endpoint security with EDR to detect and respond to threats across the fleet, complementing anti-malware with behavior analysis like UEBA, and secure apps via virtualization, MDM, and MAM.

Explore voice, video, and collaboration security in real-time networks, including VoIP, RTP, SIP, and encryption approaches, highlighting the limits of SSL/TLS and the need for proper network segmentation.

Explore remote access concepts in IPsec and VPNs, distinguishing tunneling from encrypted tunnels, and compare authentication header and ESP, plus tunnel and transport modes, split tunneling, and backhaul security.