Questions and Answers
Please select all of the valid IP addresses. Check all that apply.
How many IP addresses does a class C network have?
254
What does CIDR stand for?
Classless Inter-Domain Routing
Which of the following is a correct form of CIDR notation?
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How many octets does a subnet mask have?
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Select examples of routing protocols. Check all that apply.
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Who is permitted to use non-routable address space?
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A typical routing table may contain which of the following? Check all that apply.
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An ARP broadcast is sent to the special MAC address ________.
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The process of taking a large network and splitting it up into many individual and smaller subnetworks is known as ________.
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TTL stands for _______.
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Ranges of IP addresses that anyone can use for their internal networks are known as ______.
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In binary, 1 + 1 = _____.
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Calculate how many decimal numbers a 4-bit number can represent.
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A router is performing basic routing functions. What will be the third step in the transmission of a packet?
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How many bits long is an IP address?
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Which number cannot be represented by eight bits of data?
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Which IP address is Class C?
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What protocol is used to discover the hardware address of a node with a certain IP address?
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What is the process of taking a large network and splitting it up into many individual and smaller subnetworks called?
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What is the maximum decimal number possible to represent with 16 bits?
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How many possible host IDs do you always lose per network?
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Which are a type of interior gateway protocol? Check all that apply.
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Study Notes
Valid IP Addresses
- Valid IP addresses include 8.8.8.8 and 192.168.1.1.
- 123.456.123.456 and 257.70.312.49 are invalid due to exceeding octet limits.
Class C Network
- A Class C network can support 254 unique IP addresses.
CIDR (Classless Inter-Domain Routing)
- Stands for Classless Inter-Domain Routing.
- CIDR notation includes the IP address followed by a slash and the number of bits in the subnet mask, e.g., 192.168.1.0/24.
Subnet Mask
- Consists of 4 octets, matching the length of an IP address.
Routing Protocols
- Valid routing protocols include Border Gateway Protocol (BGP) and Routing Information Protocol (RIP).
Non-Routable Address Space
- Non-routable address space can be used by anyone for private internal networks.
Routing Tables
- Typical entries in a routing table include total hops and destination network.
ARP (Address Resolution Protocol)
- An ARP broadcast is sent to the MAC address FF:FF:FF:FF:FF:FF, requesting association with a specific IP address.
Subnetting
- Refers to dividing a large network into smaller subnetworks, allowing for better size management than traditional class systems.
TTL (Time to Live)
- A field in IP packets that prevents them from circulating indefinitely on the network by limiting their lifespan.
IP Addressing
- Non-routable address spaces are designated ranges of IP addresses available for internal network use.
Binary Arithmetic
- In binary, 1 + 1 equals 10.
Bit Representation
- A 4-bit number can represent 16 different values.
Router Packet Transmission
- The third step in a router's packet transmission is to look up the destination network in its routing table.
IP Address Length
- An IP address is composed of 32 bits and consists of four octets.
Decimal Representation Limits
- Eight bits can represent decimal numbers ranging from 0 to 255; 436 cannot be represented within this range.
Class C IP Address
- A Class C IP address has its first octet value ranging from 192 to 223; an example is 192.37.48.98.
MAC Address Discovery
- The ARP table facilitates the discovery of hardware addresses corresponding to specific IP addresses.
Maximum Decimal Representation
- The maximum decimal number representable with 16 bits is 65536.
Host IDs
- The number of usable host IDs is always reduced by 2 in any network; e.g., in a /24 network with 256 potential hosts, only 254 IPs are usable.
Interior Gateway Protocols (IGPs)
- Types include:
- Link State Routing Protocols: Advertise the state of each router's interfaces.
- Distance Vector Protocols: Share routing tables with neighboring routers, indicating the distance to known networks.
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Description
Test your knowledge on the network layer of computer networking with this quiz covering valid IP addresses, class C network sizes, and CIDR. Challenge yourself to understand the essential concepts that underpin the network functionality.
