填空题
某公司使用Windows 2003 DHCP服务器对内部主机的IP地址进行管理，DHCP服务器的新建作用域及新建保留配置如图(A)和图(B)所示。
某DHCP客户机从该DHCP服务器获取IP地址过程中，在客户机捕获的4条报文及对第4条报文的分析如下所示。请补充其中的信息。
| 编号 | 源IP地址 | 目的IP地址 | 报文摘要 | 报文捕获时间 |
| 1 | 0.0.0.0 | （1） | DHCP:Request,Type:DHCP discover |
2013-06-02 9:07:00 |
| 2 | 59.64.188.201 | 255.255.255.255 | DHCP:Reply,Type:DHCP offer |
2013-06-02 9:07:00 |
| 3 | 0.0.0.0 | 255.255.255.255 | DHCP:Request,Type:DHCP （2） |
2013-06-02 9:07:00 |
| 4 | （3） | 255.255.255.255 | DHCP:Reply,Type:DHCP ack |
2013-06-02 9:07:00 |
DHCP:-----DHCP Header-----
DHCP:Boot record type =2(Reply)
DHCP:Hardware address type =1(10M Ethernet)
DHCP:Hardware address length =6bytes
DHCP:Hops =0
DHCP:Transaction id =2219231D
DHCP:Elapsed boot time =0seconds
DHCP:Flags =0000
DHCP:0 =no broadcast
DHCP:Client self-assigned address =[0.0.0.0]
DHCP:Client address =（4）
DHCP:Next Server to use in bootstrap =[0.0.0.0]
DHCP:Relay Agent =[0.0.0.0]
DHCP:Client hardware address =001122334455
DHCP:Message Type =5(DHCP Ack)
DHCP:Address renewel interval =345600(seconds)
DHCP:Address rebinding interval =604800(seconds)
DHCP:Request IP Address lease time =691200(seconds)
DHCP:Subnet mask =（5）
request