Answer: Online Certificate Status Protocol (OCSP)
Explanation:
Hi, an Online Certificate Status Protocol (OCSP) is an internet protocol used (normally by web browsers) to determine the status of a digital certificate, for example a SSL certificate supplied by HTTPS sites.
The process is simple:
The OCSP client receives the certificate and sends it to an OSCP responder operated by the certificate authority, and receives a signed response (valid or revoked).
List and dictionary data structures keep track some of our common information that we need in the following way.
Explanation:
Every programming language has provision for data structures. In the Python programming language, there are a total of 4 inbuilt data structures. These are namely list, tuple, dictionary, and set. Each of them is unique in its own right.
List
- A data structure that stores an ordered collection of items in Python is called a list. In other words, a list holds a sequence of items. You need to put all the items, separated by commas, in square brackets to let Python know that a list has been specified. The general syntax of a list is:
- some_list = [item 1, item 2, item 3,….., item n]
- After creating a list in Python, it is possible to search, add, and remove items from the list.
Dictionary
- It stores data in the form of key-value pairs. The keys defined for a dictionary need to be unique. Though values in a dictionary can be mutable or immutable objects, only immutable objects are allowed for keys.
- A dictionary in Python is defined using key-value pairs, separated by commas, enclosed within curly braces. The key and value are separated using a colon.
- The general syntax of a dictionary is: some_dictionary ={key 1 : value 1, key 2 : value 2, key 3 : value 3,…., key n : value n}
Answer: Application layer
Explanation:
Application layer of OSI(Open system interconnection) that is responsible for interfacing the communication with the user by displaying information or message. It maintains the transmission of file and assessment, emailing faculty, using network services etc.
- According to the question,if any Skype user has complain regarding video call drop while conferencing then application is responsible to solve the issue.
- This layer will be the starting point of troubleshoot by approaching to network resources.As call drop can occur due to network service, congestion or resource issue.
There's incomplete question. But I suggest you to build ER diagram. You can use ERWin as it's the most user friendly program. You can find guides in the program. There're some tips how to build ER-diagram by given requirements.