Final answer:
Protocol analyzers are used to identify network performance issues and to find devices running on legacy protocols. They help in pinpointing network slowdowns and updating network infrastructure.
The correct reasons to use a protocol analyzer from the given options are:
a- Identify when a network is slow.
c- Measure the amount of data that can be transferred through a network
Step-by-step explanation:
A protocol analyzer is a tool used for diagnosing and troubleshooting network issues. Among its various functions, two reasons to use a protocol analyzer include:
- Identifying when a network is slow - If network performance is lackluster, a protocol analyzer can help to pinpoint where and why the network slowdowns are occurring by analyzing traffic and identifying bottlenecks.
- Find devices using legacy protocols - With a protocol analyzer, network administrators can detect devices that are operating on outdated protocols such as IPX/SPX or NetBIOS, which can help in updating network infrastructure and improving security.
While protocol analyzers could potentially gather data that might indicate the use of unauthorized sites or measure data throughput, these tasks are not as directly related to the primary functions of protocol analysis as the two reasons selected above. Additionally, simulating client connections to a website is typically a job for load testing tools, not protocol analyzers. Thus, options a and e are accurate reasons for using a protocol analyzer.