66 Appendix A
Table 7 DHCP Options
Option Description Notes
1 Subnet Mask Required. However, it is not is not required unless the thin
client must interact with servers on a different subnet (MS
DHCP requires a subnet mask and will always send one).
2 Time Offset Optional.
3 Router Optional, but recommended. It is not required unless the
thin client must interact with servers on a different subnet.
6 Domain Name Server
(DNS)
Optional, but recommended.
15 Domain Name Optional, but recommended. See Option 6.
28 Broadcast Address Optional.
44 WINS servers IP Address Optional.
51 Lease Time Optional, but recommended.
52 Option Overload Optional.
53 DHCP Message Type Recommended.
54 DHCP Server IP Address Recommended.
55 Parameter Request List Sent by thin client.
57 Maximum DHCP
Message Size
Optional (always sent by thin client).
58 T1 (renew) Time Optional, but recommended.
59 T2 (rebind) Time Optional, but recommended.
61 Client identifier Always sent.
161 File server (ftp/http/https) Optional string. Can be either the name or the IP address
of the file server. If a name is given, the name must be
resolvable by the DNS server(s) specified in Option 6. If the
option provided by the server is blank or the server
provides no value for the field, the machine on which the
DHCP server resides is assumed to also be the file server.
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