By Brion Washington
As a last examination training software, the CCNP Voice TVoice 642-427 speedy Reference provides a concise assessment of all ambitions at the new CCNP Voice Troubleshooting Cisco Unified Communications examination (642-427). This publication provide you with particular, graphical-based details, highlighting in basic terms the major issues in cram-style structure.
With this rfile as your advisor, you'll assessment themes on troubleshooting Cisco Unified Communications structures and suggestions in numerous deployments. furthermore, this e-book covers troubleshooting method, triage, assets, instruments, and fixes for Cisco Unified Communications supervisor and the hot v8.0 positive factors resembling name keep watch over Discovery, SIP Precondition, and Extension Mobility move Cluster, in addition to dial plan troubleshooting together with globalized name routing. This fact-filled speedy Reference helps you to get all-important details at a look, aiding you to concentration your research on components of weak point and to augment reminiscence retention of crucial examination concepts.
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Extra resources for CCNP Voice TVoice 642-427 : quick reference
Sample text
For example, MIME is a Layer 6 protocol that is used by e-mail software programs and Web browsers (Layer 6 applications) to convert e-mail contents that are not text into a data format that can be viewed, rendered, or otherwise processed on the computer host. Some TCP/IP protocols at Layer 6 The following TCP/IP protocols are found at Layer 6: ✦ MIME: Multipurpose Internet Mail Extensions are used to allow e-mail applications to convert e-mail message contents other than text into a data format that is supported on the receiving host.
Every host has a logical (IP) address and a physical (MAC) address. On the other hand, more than one network application may be running on each host. For example, you can have an e-mail program and a Web browser open at the same time on your host. So, how does your Web browser connect to a Web server, considering that the Web server host has only one IP address and may also be running an e-mail server application? Answer: By using standard TCP/IP ports. A standard TCP/IP port exists for HTTP (the protocol used by Web browsers), a standard TCP/IP port exists for SMTP (the protocol used by some e-mail readers), and so on.
All traffic flows through the central device. The star topology is also known as a hub-and-spoke topology. Ethernet networks using hubs or switches and twisted-pair cabling are star topologies. ✦ Ring: Hosts are connected sequentially in a daisy-chain fashion, as shown in Figure 1-3. Traffic flows around the ring. The last host in the ring is connected to the first host, thereby closing the ring. Token Ring is the typical ring topology example. Fiber Distributed Data Interface (FDDI) is also a ring topology.