Q&A
| Q. | Why do many IP addresses go unused? |
| A. | An organization that is assigned an Internet address space often doesn’t use all the host IDs associated with that address space. |
| Q. | What is the advantage of placing header information in an extension header instead of in the main header? |
| A. | The extension header is included only if the information in the header is necessary. Also, many extension headers are not processed by routers and, therefore, won’t slow down router traffic. |
| Q. | How will IPv6 help real-time applications such as video conferencing? |
| A. | The Traffic Class and Flow Level fields of the IPv6 header provide a means for specifying the type and priority of data. |
Get Sams Teach Yourself TCP/IP in 24 Hours, Fourth Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
