1
Q
Request headers: user-agent
A
the software (browser) used to make the request
2
Q
Response headers: expires
A
how long the content can be cached
3
Q
Ways that clients can be directed to a cache
A
- Browser configuration
2. Server directed. Uses a redirect 3xx to point to a CDN or cache.
4
Q
CDN: basic goal
A
Replicate content on many servers
5
Q
CDN: what metric to select best server?
A
Lowest latency
6
Q
Content Routing: Naming-based Redirection (DNS)
A
- Provides fine-grained control
2. Fast
7
Q
Bit Torrent: Choking
A
Refusal to upload to a particular peer
If a peer can’t upload, don’t allow them to download.
8
Q
Chord: what is it?
A
- Distributed Hash Table
2. Lookup service (anything that is basically key/value)
9
Q
Consistent Hashing: what is it for?
A
- key/values are distributed along the entire system
10
Q
Consistent Hashing: where are keys stored?
A
They are stored in the successor node.
In the lecture, this was the “ring”
