1. (a) A block of 8192 addresses is available for allocation to hosts, starting with 192.24.0.0. The following organizations request addresses, Tithe an Oireachtais, An Post, and Raidió Teilifís Éireann. Tithe an Oireachtais need(s) 2048 addresses and is assigned 192.24.0.0/21. An Post needs 4096 addresses and is assigned 192.24.16.0 and the subnet mask 255.255.240.0. Finally, Raidió Teilifís Éireann asks for 1024 addresses and is assigned 192.24.8.0/22. (i) How many addresses are left after this allocation has been performed? (ii) If any addresses are available, give the network prefix for the available network. (iii) Give the first valid address and the last valid address of the available address space. [10 Marks]

(Practice) Although the total number of bytes varies from computer to computer, memory sizes of millions and billions of bytes are common. In computer language, the letter M representsthe number 1,048,576, which is 2 raised to the 20th power, and G represents 1,073,741,824, which is 2 raised to the 30th power. Therefore, a memory size of 4 MB is really 4 times 1,048,576 (4,194,304 bytes), and a memory size of 2 GB is really 2 times 1,073,741,824 (2,147,483,648 bytes). Using this information, calculate the actual number of bytes in the following: a. A memory containing 512 MB b. A memory consisting of 512 MB words, where each word consists of 2 bytes c. A memory consisting of 512 MB words, where each word consists of 4 bytes d. A thumb drive that specifies 2 GB e. A disk that specifies 4 GB f. A disk that specifies 8 GB

Which two of the following hosts on a corporate intranet are on the same subnet? a.192.168.2.143255.255.255.0b.172.54.98.3255.255.0.0c.192.168.5.57255.255.255.0d.172.54.72.89255.255.0.0

Network latency issues are often caused by SELinux or AppArmor restrictions. True or False?