Inter-domain DNS Request Routing Example

1.

2.

3.

4.

5.

6.

Client

LDNS

RR

• Client Request to LDNS

• LDNS to Auth CDN RRS

• RR makes decision

• Returns CNAME to CDN2

• Lookup to CDN2

• CDN2 returns surrogate

• Answer to client

7.

CDN1

CDN2

=surrogate

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