Alice has 2 types of memory, one is type A , it is very fast buy small, it takes 5 mc to read an object and is 10GB . the other memory is type Z. it is 1TB in size and can store . Reading an object takes 200ms Alice is going to build a system where she keeps objects in both memories. She has 2048 objects all the same size. Which use up all of her type Z memory. She wants to anayle different ways she can use the 2 memories.
If alice randomly fill the type A memory and never changes it, what is her expected time to read 10 objects?
Alice now runs a workload where 20 obj per minutes. 50% of the objects she reads in are objects shes has seen in the past 30 sec. the other 50% are randomly take from the full 2048. Using the same naive strategy as before what is her expected average time to read an object?
Now Alice decides that every time she reads an object she will add it to memory A, when she needs to remove something she will remove the oldest object in the memory , what is her new BEST case AVERAGE runtime ? (continuation of q2)
WORST case AVERAGE runtime for 1 obj?

Local area networks use many of the same network technologies and the internet, only on a smaller scale. devices that access lans are equipped with a network interface that contains circuitry for wireless or wired connections. devices also have a physical address, in addition to the ip addresses acquired from a dhcp server. the most popular wired technology is . the most popular wireless technology is , which can be configured as a(n) or star topology. setting up a lan and configuring its router is fairly easy. the first step is to change the standard to one that is secure. next, create a(n) that uniquely identifies the network by name. it is also important to activate wireless to prevent wireless signals from being intercepted during transmission. a limited-access network can be created for visitors to use. by activating , the router will be able to assign ip addresses to each device that joins the network. to connect to a secure lan that is protected by encryption, an encryption , or password, is required. lans can be used to access data collected by iot devices and the networks that tie these devices together. technologies such as rfid, nfc, bluetooth smart, zigbee, and z-wave offer -power links, essential for battery-powered devices that can’t expend excess amounts of energy transmitting data.