Question Question Question EdTech 552: Lab 3 Answer Sheet

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1 Question Question Answers a b c d e f g h i j Question Question Answers a b c d e f g h i j Question What is the decimal and binary range of the first octet of all possible Class B IP addresses? Decimal: From: 128 To: 191 Binary: From: To: Which octet(s) represent the network portion of a Class C IP address? First, second & third 3. Which octet(s) represent the host portion of a Class A IP address? Second, third & fourth 4. What is the maximum number of useable hosts with a Class C network address? How many Class B networks are there? How many hosts can each Class B network have? How many octets are there in an IP address? How many bits per octet? 4 octets, 8 bits per octet

2 Question Host IP Class Network Host Network Broadcast C Default Subnet Mask A B C B Question IP Host Valid? Why or Why Not (Yes/No) No This is a class B network broadcast address Yes This is a valid class B network address No The last octet cannot be 0 in a valid address, this is subnet address Yes This is a valid class A network address No Octet range cannot be greater than 255 (second octet is not valid) No The first octet is 127, which is reserved for loopback testing No This is a class D address, for multicasting, only valid for servers

3 Question Subnet No. Subnet Bits Borrowed Binary Value Subnet Bits Decimal and Subnet No. Host Bits Possible Binary Values (Range) (5 Bits) Subnet/Host Decimal Range Use? 0 Subnet No no subnet 1st Subnet Yes 2nd Subnet Yes 3rd Subnet Yes 4th Subnet Yes 5th Subnet Yes 6th Subnet Yes 7th Subnet No reserved for network broadcast Use the table just developed to help answer the following questions: 1. Which octet(s) represent the network portion of a Class C IP address? 1 st, 2 nd & 3 rd octets 2. Which octet(s) represent the host portion of a Class C IP address? 4 th octet 3. What is the binary equivalent of the Class C network address in the scenario? Decimal network address: Binary network address: How many high- order bits were borrowed from the host bits in the fourth octet? 3 5. What subnet mask must be used? Show the subnet mask in decimal and binary. Decimal subnet mask: Binary subnet mask: What is the maximum number of subnets that can be created with this subnet mask? 8 7. What is the maximum number of useable subnets that can be created with this mask? 6 8. How many bits were left in the fourth octet for host IDs? 5 9. How many hosts per subnet can be defined with this subnet mask? What is the maximum number of hosts that can be defined for all subnets with this scenario? Assume the lowest and highest subnet numbers and the lowest and highest host ID on each subnet cannot be used Is a valid host IP address with this scenario? Why or why not? No, it is the broadcast address for the first subnet.

4 12. Is a valid host IP address with this scenario? Why or why not? No, it is the subnet identification address (subnet number) for the 5 th subnet. 13. Host A has an IP address of Host B has an IP address of Are these hosts on the same subnet? Why? No. Host A is on the 3 rd subnet but Host B is on the 4 th subnet.

5 Question Given a Class A network address of / 24 answer the following questions 1. How many bits were borrowed from the host portion of this address? What is the subnet mask for this network? Dotted decimal? Binary? How many usable subnetworks are there? How many usable hosts are there per subnet? What is the host range for usable subnet sixteen? What is the network address for usable subnet sixteen? What is the broadcast address for usable subnet sixteen? What is the broadcast address for the last usable subnet? What is the broadcast address for the major network? Question Given this Class B network address and these requirements answer the following questions How many subnets are needed for this network? What is the minimum number of bits that can be borrowed? 7 3. What is the subnet mask for this network? Dotted decimal? Binary? Slash format /23 5. How many usable subnetworks are there? How many usable hosts are there per subnet? 510

6 Question Subnetwork # Subnetwork ID Host Range Broadcast ID (non- useable) (non- useable) (Network Broadcast) 1. What is the host range for subnet two? What is the broadcast address for the 126th subnet? What is the broadcast address for the major network? Question Given this Class C network address and these requirements answer the following questions 1. How many subnets are needed for this network? 5 useable (7 total) 2. What is the subnet mask for this network? Dotted decimal? Binary? Slash format /27 4. How many usable hosts are there per subnet? 30

7 Question Subnetwork # Subnetwork IP Host Range Broadcast ID (non useable) (non- useable) (network address) 1. What is the host range for subnet six? What is the broadcast address for the 3rd subnet? What is the broadcast address for the major network?

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