Serial

<aside> 💡 One bit after another in order (used in USB)

</aside>

✅ Advantages

• Only one wire required - reduces costs and physical space required
• Not slow as the clock controls how fast data can be sent
• Can travel longer distances than parallel
• Faster

Parallel

<aside> 💡 Can send more than one bit at the same time (slower)

</aside>

❌ Disadvantages

• Not all signals/bits are sent at the same speed - some can lag behind which is known as skew
• No more can be sent until every bit is received - difficult to stay synchronised
• Crosstalk - where the lanes clash with each other

Simple, half duplex and full duplex

<aside> 💡 Deciding how data is transmitted between computers

</aside>

Simplex

<aside> 💡 Data can only travel in one direction

</aside>