Cisco DQOS exam certification guide: IP telephony self-study by Wendell Odom

By Wendell Odom

Arrange of the IP Telephony concentrated Certifications with the reliable DQOS/QOS attempt education consultant. * grasp over 20 caliber of provider (QoS) gains, together with either MQC-enabled and non-MQC good points * QoS characteristic comparisons express modifications, merits and similarities, supporting the reader determine the optimum QoS array for his or her community * Use as a connection with QoS applied sciences, and get ready for the DQOS examination with the single Cisco approved examination instruction bookQuality of carrier (QoS) is a vital point to development a versatile, available, and effective community. Its position in a number of applied sciences underlines the necessity for many networking execs to grasp the positive aspects that enforce QoS. QoS, and in particular the QoS beneficial properties that an IT expert implements on diversified applied sciences, is helping prioritize and advisor site visitors flows in a fashion that maximizes the buyer adventure. This prioritization is only one section of QoS, and diverse good points can be utilized to figure out this move. As extra advanced applied sciences like Voice over IP are applied on networks, QoS becomes extra important. this can be very true whilst those applied sciences raise the variety of these gaining access to and utilizing the community.

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Extra info for Cisco DQOS exam certification guide: IP telephony self-study

Example text

However, the higher volume of packets that a router can forward, and the higher volume of packets forwarded using a particular processing method, presumably the lower the forwarding delay. Most delay components in LAN switches are small enough not to matter. However, switches incur forwarding delay, just like routers—most of the time. Some LAN switches use a “storeand-forward” forwarding logic, when the entire frame must be received before forwarding any part of the frame. However, some switches use cut-through or fragment-free forwarding, which means that the first bits of a frame are forwarded before the final bits are fully received.

QoS Exam Objective • Describe the need for IP QoS. book Page 3 Wednesday, July 16, 2003 4:06 PM CHAPTER 1 QoS Overview Cisco provides a large number of quality of service (QoS) features inside Cisco IOS Software. When most of us think about QoS, we immediately think of the various queuing mechanisms, such as Weighted Fair Queuing, or Custom Queuing. QoS features include many more categories, however—fragmentation and interleaving features, compression, policing and shaping, selective packet-drop features, and a few others.

The questions are generally harder than the actual exam, partly because the questions are in “short answer” format, instead of multiple choice format. These questions are a great way to increase the accuracy of your recollection of the facts and to practice for taking the exam. • Examples—Located inside the Foundation Topics of most chapters, the text includes screen captures from lab scenarios that show how each tool works. The examples include a topology, the configuration, and show command output that matches the examples.

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