CBK#2 Telecommunications & Network Security - Page 9

CBK#2 Telecom. & Network Security - Page 1 2 3 4 5 6 7 8 9 10

SMDS - Switched Mulitmegabit Data Service:
Is a high-speed packet-switched technology used to enable customers to extend their LANs across MANs and WANs
Is connectionless and can provide bandwidth on demand.
SDLC - Synchronous Data Link Control:
Is based on networks that use dedicated, leased lines with permanent physical connections.
Provides the polling media access technology, which is a mechanism that enables secondary stations to communicate on the network.
HDLC - High-level Data Link Control:
Is a bit-oriented link layer protocol used for transmission over synchronous lines.
Works with primary stations that contact secondary stations to establish data transmission.
HSSI - High-Speed Serial Interface:
Is used to connect multiplexers and routers to high-speed communication services like ATM and frame relay.
Multiservice Access:
Combine different types of communication categories over one transmission line.
Jittering - When someone using VoIP for phone call experiences lags in the conversation.
H.323:
Is a part of ITU-T recommendations that cover a wide variety of multimedia communication services.

Remote Access
Dial-up and RAS:
RAS / Remote Access Service server - Performs authentication by comparing the provided credentials with the database of credentials it maintains.
Wardialing - Is a process used by many attackers to identify remote access modems.
ISDN - Integrated Services Digital Network:
Breakes the telephone line into different channels and transmits data in a digital form versus the old analog method.
Three methods -
- BRI / Basic Rate Interface - 2 B channels and 1 D channel.
- PRI / Primary Rate Interface - 23 B channels and 1 D channel.
- BISDN / Broadband - Handle different types of services at the same time.
The D channel provides for a quicker call setup and process of making a connection.
DSL - Digital Subscriber Line:
Is a broadband technology.
The services can be symmetric -> Speed upstream <> downstream.
Connected all the time.
Cable modems:
Provide high speed access.
Connected all the time.

CBK#2 Telecom. & Network Security - Page 1 2 3 4 5 6 7 8 9 10

CISSP Summary 2002 |  Related links | References

CBK#1 Access Control Systems & Methodology | CBK#2 Telecommunications & Network Security | CBK#3 Security Management Practices | CBK#4 Applications & Systems Development Security | CBK#5 Cryptography | CBK#6 Security Architecture & Models | CBK#7 Operations Security | CBK#8 Business Continuity Planning & Disaster Recovery Planning | CBK#9 Law, Investigations & Ethics | CBK#10 Physical Security

Contact:

E-mail: john.wallhoff@mailbox.swipnet.se
Written by: J.Wallhoff January - April 2002
Updated by: J.Wallhoff April 2002