The Bits and Bytes of Computer Networking. Week 2: The Network Layer

Please select all of the valid IP addresses. Check all that apply. 8.8.8.8, 123.456.123.456, 192.168.1.1, 257.70.312.49 - Answer- 8.8.8.8, 192.168.1.1 How many IP addresses does a class C network have? - Answer- 254 addresses What does CIDR stand for? - Answer- CIDR stands for Classless Inter-Domain Routing Which of the following is a correct form of CIDR notation? - Answer- 192.168.1.0/24; CIDR notation uses a forward slash and then lists the numbers of bits in the subnet mask. How many octets does a subnet mask have? - Answer- 4; A subnet mask is the same length as an IP address. Select examples of routing protocols. Check all that apply. - Answer- Border Gateway Protocol/ Routing Information Protocol Who is permitted to use non-routable address space? - Answer- Anyone; Anyone can use non-routable address space. A typical routing table may contain which of the following? Check all that apply. - Answer- Total hops/ Destination network An ARP broadcast is sent to the special MAC address ________. - Answer- FF:FF:FF:FF:FF:FF; ARP broadcasts are used to ask all devices on a local area network if they're associated with a specific IP address. The process of taking a large network and splitting it up into many individual and smaller subnetworks is known as ________. - Answer- Subnetting; Subnetting allows for much finer-grained controls of network sizes than the old class system could support. TTL stands for _______. - Answer- Time to Live; TTL is used to make sure that an undeliverable packet doesn't spend all of eternity waiting for delivery. Ranges of IP addresses that anyone can use for their internal networks are known as ______. - Answer- Non-routable address space; Non-routable address space can be used by anyone. In binary, 1 +1 = _____.