In Slotted ALOHA, time is divided into slots, and each time slot is x seconds long, where x is the frame transmission time; stations are allowed to transmit only at the beginning of a time slot. Consider a special version of Slotted ALOHA where each time slot is instead 0.7x seconds long; the frame transmission time is still x seconds and stations are allowed to transmit only at the beginning of a time slot. What is the length of the vulnerable period for this special version of Slotted ALOHA?

Usually, when we sniff packets, we are only interested certain types of packets. we can do that by setting filters in sniffing. scapy’s filter use the bpf (berkeley packet filter) syntax; you can find the bpf manual from the internet. set the following filters and demonstrate your sniffer program again (each filter should be set separately): (a) capture only the icmp packet. (b) capture any tcp packet that comes from a particular ip and with a destination port number 23. (c) capture packets comes from or to go to a particular subnet. you can pick any subnet, such as 128.230.0.0/16; you should not pick the subnet that your vm is attached to.

You are new to microsoft certification and want to start out by getting a certification geared around windows 8. what microsoft certification should you pursue?

Is an attack that relies on guessing the isns of tcp packets