Download Access technologies : DSL and cable by James H. Green PDF

By James H. Green

Show description

Read or Download Access technologies : DSL and cable PDF

Best professional books

Professional SharePoint 2010 Administration

Thorough insurance of the advancements and alterations to SharePoint 2010

SharePoint 2010 boasts various terrific new positive factors that may problem even the main skilled administrator who's upgrading from SharePoint 2007. Written through a staff of SharePoint specialists, this publication areas a takes goal at displaying you the way to make those new positive aspects paintings good for you.
Offering an in-depth examine SharePoint 2010, the authors specialise in how SharePoint performance has replaced from its earliest model to its most recent, and so they give you targeted assurance of all of the new good points and functions. * provides in-depth insurance of the recent gains and features of SharePoint 2010
* Demonstrates set up, configuration, and upgrading current SharePoint 2007 servers
* Discusses structure and ability making plans, securing and coping with web site content material, and integrating place of work clients
* info the protocol for dealing with tracking, growing backups, and executing catastrophe recovery
* Addresses shared carrier purposes, navigation and governance, and company intelligence and reporting services

Professional SharePoint 2010 offers an outstanding realizing of the performance that SharePoint 2010 presents, in an effort to let you see what it may well do for you.

First Aid for the Internal Medicine Boards (FIRST AID Specialty Boards)

The insider's consultant to acing the inner medication forums written via physicians who handed practice the confirmed First reduction formulation for examination luck! New FULL-COLOR layout! five megastar DOODY'S evaluate "I want I had this e-book whilst i used to be learning for my forums. it's worth the cost for either examine for the forums and for a fast reference.

Wiley CPAexcel Exam Review 2014 Focus Notes: Regulation

All of the details you want to go the CPA examination in your ownUpdated every year with the newest AICPA content material directions, Wiley CPAexcel examination assessment 2014 concentration Notes offers a evaluation of all of the uncomplicated abilities and ideas proven at the CPA examination and teaches vital thoughts to take the examination speedier and extra thoroughly.

The Nervous System

This is often an built-in textbook at the anxious method, masking the anatomy, body structure and biochemistry of the approach, all awarded in a clinically proper context acceptable for the 1st years of the clinical pupil path. one of many seven volumes within the structures of the physique sequence. Concise textual content covers the middle anatomy, body structure and biochemistry in an built-in demeanour as required by means of method- and problem-based scientific classes.

Extra info for Access technologies : DSL and cable

Example text

Some types of DSL ride on top of a POTS line, while others use the cable pair down to a DC level, which precludes the use of a POTS line. 1 shows the layout of DSL service. The DSLAM demultiplexes the signal from the subscriber, splitting the service so the telephone service connects to the central office while the data portion feeds into the ILEC’s backbone network, where it is routed to the service provider. DSL is not an ILEC monopoly service. ILECs typically did not lease bare cable pairs until the Telecommunications Act of 1996 required them to make unbundled network elements (UNEs) available at any feasible interconnection point.

More frequently, a routing protocol such as IP is used and the network is connected through routers. The TCP/IP protocol falls under the blanket of packet switching. S. Department of Defense initially conceived packet switching as a security measure. If a message is broken into small packets and sent through the core network over random patterns, it is difficult to reassemble the message except at the access point. If the access circuit is kept short, it is easy to secure. Furthermore, if the core network has plenty of bandwidth, packets from other sessions can be interleaved to use the excess capacity.

The first reason is that cells can be switched in hardware, which is faster than routing. The fixed cell length makes it easier to maintain a high degree of utilization. The second reason is that it is easier to control latency and jitter, which are critical quality of service (QoS) elements in real-time applications such as voice and video. If a cell is lost in transmission, it has a minimal impact on quality because the amount of voice or video information contained in one cell is negligible.

Download PDF sample

Rated 4.17 of 5 – based on 8 votes