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level: Subnet masking, DHCP, NAT

Questions and Answers List

level questions: Subnet masking, DHCP, NAT

QuestionAnswer
What is a subdivision of a network called?Subnet
Describe how a subnet mask is used to identify the network identifier part of the IP addressNeed the IP address of the device Need the subnet mask You then logically AND these two together
State the how the DHCP system functionsAs a device joins a network the DHCP selects an IP addresses from a pool of available addresses Once a device leaves the network its IP addresses is added back to the pool
State the purpose of the DHCP systemReduce the number of waste private IP addresses
Explain the step by step concept of NAT for data sent from a private device to a public device1. Initially, at private ip address the source address: its own ip and the destination address: public destination device 2. Gets forwarded to router 3. Router stores its own public ip addresses alongside the private ip address of the source device in a table 4. Then changes the source address to be its own public ip address and sends the information away 5. Public device receives this and sends back data with its own public source address and the destination of the routers public address 6. Arrives at the router and it reads this, using the information stored in the table changes the destination address to be the stored private ip address 7. Data is sent and receives
Why is NAT usedIssue of communication between a routable and non routable device
What does 'NAT' stand forNetwork Address Translation
What does 'DHCP' stand forDynamic Host Configuration Protocol
In terms of communication for NAT, how many ip addresses does a router have and wat are they called2 Private and public ip addresses