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Transcribed Image Text:**5.12. BGP: Importing Advertisements**
Consider the network diagram below, assuming that a provider network only wants to carry traffic to or from its customer networks. Examine the network structure and determine which of the following statements are true (Hint: more than one statement is true).
**Diagram Explanation:**
- **Nodes**:
- **Provider Nodes (Blue):** A, B, C, D (central nodes representing a provider network).
- **Customer Nodes (Black):** w, x, y, z (peripheral nodes connected as customer networks).
- **Connections**:
- **Provider Network Connections:**
- Node A is connected to Nodes Z, B.
- Node B is connected to Nodes A, D, X.
- Node D is connected to Nodes W, C, Y, X.
- **Customer Network Connections:**
- Node W is connected to Node D.
- Node X is connected to Node B.
- Node Y is connected to Node D.
- Node Z is connected to Node A.
**Legend**:
- Provider networks are indicated by blue nodes.
- Customer networks are indicated by black nodes.
**Statements:**
1. □ D will forward an advertisement for a path that terminates at x to z.
2. □ D will receive an advertisement Cx.
3. □ D will receive an advertisement Bx.
4. □ D will forward an advertisement for a path that terminates at x to w.
5. □ D will receive an advertisement ABx.
In the context of BGP (Border Gateway Protocol), consider the rule that provider networks prefer not to forward advertisements to other providers, only to customers. Analyze the paths and select the statements that abide by this principle.
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