MCSE Certification boot camp training : MCSE MCITP Boot Camp Notes :

MCSE: Server Infrastructure

Solutions Expert

The globally recognized standard for IT professionals

The Microsoft Certified Solutions Expert (MCSE): Server Infrastructure certification validates that you have the skills needed to run a highly efficient and modern data center, with expertise in identity management, systems management, virtualization, storage, and networking.

MCSE 2016 Boot Camp : Azure Boot camp : CCNA / CCNAX Boot Camp:

Earning an MCSE: Server Infrastructure certification will qualify you for such jobs as computer support specialist and information security analyst.

Heard about the coming Windows Server 2012 R2 updates? Read the FAQs to find out how we are updating our certifications.

Step	Title	Optional training	Required exam
1	Installing and Configuring Windows Server 2012	410	410
2	Administering Windows Server 2012	411	411
3	Configuring Advanced Windows Server 2012 Services After successfully completing steps 1-3, you'll earn a Microsoft Certified Solutions Associate (MCSA): Windows Server 2012 certification.	412	412
4	Designing and Implementing a Server Infrastructure	413	413
5	Implementing an Advanced Server Infrastructure	414	414

Asynchronous Transfer Mode (ATM)

Asynchronous Transfer Mode (ATM) is a high-bandwidth switching technology developed by the ITU Telecommunications Standards Sector (ITU-TSS). An organization called the ATM Forum is responsible for defining ATM implementation characteristics. ATM can be layered on other Physical layer technologies, such as Fiber Distributed Data Interface (FDDI) and SONET. The relationships of these protocols to the OSI model are shown in Figure 7.11.

Several characteristics distinguish ATM from other switching technologies. ATM is based on fixed-length, 53-byte cells, whereas other technologies employ frames that vary in length to accommodate different amounts of data. Because ATM cells are uniform in length, switching mechanisms can operate with a high level of efficiency. This high efficiency results in high data transfer rates. Some ATM systems can operate at an incredible rate of 622 Mbps; a typical working speed for an ATM is around 155 Mbps.

The unit of transmission for ATM is called a cell. All cells are 53 bytes long and consist of a 5-byte header and 48 bytes of data. The 48-byte data size was selected by the standards committee as a compromise to suit both audio and data-transmission needs. Audio information, for instance, must be delivered with little latency (delay) to maintain a smooth flow of sound. Audio engineers therefore preferred a small cell so that cells would be more readily available when needed. For data, however, large cells reduce the overhead required to deliver a byte of information.

Asynchronous delivery is another distinguishing feature of ATM. Asynchronous refers to the characteristic of ATM in which transmission time slots don’t occur periodically but are granted at irregular intervals. ATM uses a technique called label multiplexing, which allocates time slots on demand. Traffic that is time-critical, such as voice or video, can be given priority over data traffic that can be delayed slightly with no ill effect. Channels are identified by cell labels, not by specific time slots. A high-priority transmission need not be held until its next time slot allocation. Instead, it might be required to wait only until the current 53-byte cell has been transmitted.

Other multichannel technologies utilize time-division techniques to allocate bandwidth to channels. A T1 (1.544 Mbps) line, for example, might be time-division multiplexed to provide 24 voice channels. With this technique, each channel is assigned a specific time slot in the transmission schedule. The disadvantage of this technique is that an idle channel doesn’t yield its bandwidth for the creation of other channels.

Devices communicate on ATM networks by establishing a virtual path, which is identified by a virtual path identifier (VPI). Within this virtual path, virtual circuits can be established, which are in turn associated with virtual circuit identifiers (VCIs). The VPI and VCI together make up a three-byte field included in the cell header.

ATM is relatively new technology, and only a few suppliers provide the equipment necessary to support it. (ATM networks must use ATM-compatible switches, routers, and other connectivity devices.)

Other networks, such as a routed Ethernet, require a six-byte physical address as well as a network address to uniquely identify each device on an internetwork. An ATM can switch cells with three-byte identifiers because VPIs and VCIs apply only to a given device-to-device link. Each ATM switch can assign different VPIs and VCIs for each link, and up to 16 million circuits can be configured for any given device-to-device link.

Although ATM was developed primarily as a WAN technology, it has many characteristics of value for high-performance LANs. An interesting advantage of ATM is that ATM makes it possible to use the same technology for both LANs and WANs. Some disadvantages, however, include the cost, the limited availability of the equipment, and the present lack of expertise regarding ATM due to its recent arrival.

Two other evolving technologies show promise:

Synchronous Optical Network (SONET). Bell Communications Research developed SONET, which has been accepted as an ANSI standard. As the “optical” in the name implies, SONET is a standard for communication over fiber-optic networks. Data rates for SONET are organized in a hierarchy based on the Optical Carrier (OC) speed and the corresponding Synchronous Transport Signals (STS) employed. The basic OC and STS data rate is 51.84 Mbps, but higher data rates are provided in multiples of the basic rate. Thus OC-48 is 48 X 51.84 Mbps or 2488.32 Mbps.
Switched Multimegabit Digital Service (SMDS). Developed by Bell Communications Research in 1991, SMDS technology is related to ATM in that it transports data in 53-byte cells. SMDS (see Figure 7.12) is a connectionless Data Link layer service that supports cell switching at data rates of 1.544 to 45 Mbps. IEEE 802.6 (DQDB metropolitan area network) is the primary Physical layer standard employed with SMDS, although other Physical layer standards are supported.

MCSE Boot Camp
CCNA Boot Camp
Call : 800-519- 2267

	Home Notes

	Home

	MCSE

	MCSE + Security

	CCNA

	CCNP

	Schedule

	Register

	Frequently Asked Questions

	Course Fees

	Contact US

	Boot Camp Location

	Compare us to our competitors

	Testimonials

	Sitemap

Testimonials

Join MCSE Boot Camp & CCNA Boot Camp Back to Back Certification Today.
links 270 290 291 293 294 298 299 Security 640-801 routing 811 821 831 Resources MCSE + CCNA Training Card pay Papal MCSE Notes CCNA Notes

index

main root

link resources home
Medical Tourism Ref1 Ref2

MCSE Boot Camp, MCSE Certification boot camp, MCSE Training boot camps, MCSE certification boot camp training at California and Maryland USA. Also CCNA, CCNP, CISSP, Red Hat Linux Certification notes.

Vibrant boot camp offers MCSE, CCNA, CCNP Certification back to back

Vibrant offers MCSE certification training boot camp for $5400 all inclusive, instructor led at California and Baltimore.

MCITP MCSE BOOT Camp Thailand

MCITP MCSE Boot camp India

MCITP MCSE Boot camp UK