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What is the difference between layer 2 and layer 3 devices? What

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What is the difference between layer 2 and layer 3 devices?

What is the subnet for a class C network?

What is a NIS server/client before

What is a NFS server?
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Layer 2 is your standard switches? they exachange packets based on MAC address.

Managed switches can be considered layer 2/layer 3 devcies because they use both MAC add LAN Ids to control destination packets

Layer 3 devices are your routers, they work with IP Addresses.

Standard subnet mask for a class C would Be however you can further subnet the last octet.

NIS is a client–server directory service protocol for distributing system configuration data such as user and host names between computers on a computer network. A perfect example would be a WINS server or an AD server that requires user authentication to access a VPN for example.

An NFS is a Network File Server. This is used to store user profile folders, and any type of files, including databases which need to be shared throughout an organization.
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