What is the difference between a session cookie and a bearer token API?
PICTURE THIS: A SENTENCE BECOMES TOKENS
The model does not read letters like humans. It reads these pieces, then predicts the next one.
Simple meaning
Session cookies suit browser apps with same-site protection.
WHY — Auth instead of guessing?
Why interviewers care about Auth:
contrast on Auth, not two memorised paragraphs.
the developer, then one case where picking wrong hurts.
Name the idea, why it exists, then one short example.
End with when you use it and one common pitfall.
STEPS — What happens with tokens?
Before the model can read a sentence, it goes through these steps:
- 1Session cookies suit browser
apps with same-site protection.
- 2Bearer tokens suit mobile
and third-party clients.
- 3I do not mix
patterns carelessly across one product.
- 4Context mix
Attention looks at nearby tokens together.
- 5Next token
The model scores what should come next.
- 6Decode
IDs turn back into readable text.
EXAMPLE — See it in action
Let's see how a real sentence is tokenized (tokens may vary by model):
Note: Actual tokens and IDs depend on the tokenizer (e.g., GPT, Llama, etc.).
Key takeaway
Session cookies suit browser apps with same-site protection. Bearer tokens suit mobile and third-party clients.