CISSP Exam Note (Domain 2: Telecommunications and Networking Security) – Protocols – Continued

March 7, 2010 · Posted in Don's eBook Report, InfoSec Docs, Information Security, Information Systems, Information Technology 

Data Encapsulation

  • The process in which information from one packet is wrapped around or attached to the data of another packet
  • In the OSI model each layer encapsulates the layer immediately above it

OSI Layers

  • Process down the stack and up the stack
  • Each layer communicates with corresponding layer through the stack

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6 OSI Security Services

  • A security service is a collection of security mechanisms, files and procedures that help protect the network
    • Authentication
    • Access Control
    • Data Confidentiality
    • Data Integrity
    • Non-repudiation
    • Logging & monitoring

8 OSI Security Mechanisms

  • A security mechanism is a control that is implemented in order to provide the 6 basic security services
    • Encipherment
    • Digital Signature
    • Access Control
    • Data Integrity
    • Authentication
    • Traffic Padding
    • Routing Control
    • Notarization

TCP/IP Suite of Protocols

OSI

TCP/IP

Protocols

Description
Application Application Layer Consists of the applications and processes that use the network
Presentation
Session
Transport Transport Layer (Host to Host) TCP & UDP Provides end-to-end data delivery service to the Application Layer
Network Internet Layer IP, ARP, RARP, ICMP Defines the IP datagram and handles the routing of data across networks
Data Link Network Consists of routines for accessing physical networks and the electrical connection
Physical

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