# Q1A · ARP versus RARP

Subject: Computer Networks

Exam: M2

Reader: https://deep-learning-study-room.vercel.app/cn/#m2/mocks/mock-b/q1a

Canonical: https://deep-learning-study-room.vercel.app/read/cn/m2/mocks/mock-b--q1a/

Q1(a)+Q1(b) compulsory; choose any two of Q2/Q3/Q4 · 10 marks attempted

### Question. Distinguish ARP and RARP with one use of each. [2 practice marks]

#### Answer

| Protocol | Known | Needed | Use |
| --- | --- | --- | --- |
| ARP | Local next-hop IPv4 | MAC/hardware address | Local frame delivery |
| RARP | Client hardware address | Client IPv4 | Historical boot-time assignment |

#### Practical example

A diskless workstation with a pre-registered hardware address could use RARP to learn its assigned IPv4 address from a local RARP server.