Match the following:
| (P) | SMTP | (1) | Application layer |
| (Q) | BGP | (2) | Transport layer |
| (R) | TCP | (3) | Data link layer |
| (S) | PPP | (4) | Network layer |
| (5) | Physical layer |
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Match the following:
| (P) | SMTP | (1) | Application layer |
| (Q) | BGP | (2) | Transport layer |
| (R) | TCP | (3) | Data link layer |
| (S) | PPP | (4) | Network layer |
| (5) | Physical layer |