Network scalability is the ability of a network to handle an increasing number of users and traffic without significantly degrading performance.

Bottlenecking is a condition in which a network component is unable to handle the amount of traffic that is being sent through it. This can lead to a decrease in network performance.

Capacity is the maximum amount of data that can be transmitted over a network in a given amount of time.

The weather can affect the performance of a network, but it is not a factor that can be controlled.

Latency is the time it takes for a packet of data to travel from one point on a network to another.

Jitter is a measure of the variation in the delay of packets of data. It is not a common metric for measuring network performance.

Packet loss is the percentage of packets that are lost in transit over a network.

Tunneling is a technique for sending data over a network in a way that is transparent to the underlying network infrastructure. It is not a common technique for improving network scalability.

Subnetting is the process of dividing a network into multiple smaller networks.

Firewalls are not a type of network segmentation. They are used to control access to a network.

Routing is the process of connecting two or more networks together.

STP is a spanning tree protocol. It is not a routing protocol.

Tunneling is the process of sending data from one network to another.

IPsec is a security protocol. It is not a tunneling protocol.

Encoding is the process of converting data from one format to another.