Summarize this into 2-3 sentences in your own words.
this topic covers the causes of loops in a layer 2 network and briefly explains how spanning tree protocol works. redundancy is an important part of the hierarchical design for eliminating single points of failure and preventing disruption of network services to users. redundant networks require the addition of physical paths, but logical redundancy must also be part of the design. having alternate physical paths for data to traverse the network makes it possible for users to access network resources, despite path disruption. however, redundant paths in a switched ethernet network may cause both physical and logical layer 2 loops.

File account.java (see previous exercise) contains a definition for a simple bank account class with methods to withdraw, deposit, get the balance and account number, and return a string representation. note that the constructor for this class creates a random account number. save this class to your directory and study it to see how it works. then write the following additional code: 1. suppose the bank wants to keep track of how many accounts exist. a. declare a private static integer variable numaccounts to hold this value. like all instance and static variables, it will be initialized (to 0, since it’s an int) automatically. b. add code to the constructor to increment this variable every time an account is created. c. add a static method getnumaccounts that returns the total number of accounts. think about why this method should be static - its information is not related to any particular account. d. file testaccounts1.java contains a simple program that creates the specified number of bank accounts then uses the getnumaccounts method to find how many accounts were created. save it to your directory, then use it to test your modified account class.