Does my modem have internal ip address?

Question

Do I have to have a router in order to obtain an internal ip address?
I went to cmd and used
ipconfig /all and got this


Windows IP Configuration

Host Name . . . . . . . . . . . . : owner-b2d7970f6
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Broadcast
IP Routing Enabled. . . . . . . . : Yes
WINS Proxy Enabled. . . . . . . . : No
DNS Suffix Search List. . . . . . : hsd1.or.comcast.net.

Ethernet adapter Local Area Connection 3:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Hamachi Network Interface #2
Physical Address. . . . . . . . . : 7A-79-05-FC-B2-E2
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 5.252.178.226
Subnet Mask . . . . . . . . . . . : 255.0.0.0
Default Gateway . . . . . . . . . :
DHCP Server . . . . . . . . . . . : 5.0.0.1
Lease Obtained. . . . . . . . . . : Sunday, January 25, 2009 3:12:48 PM
Lease Expires . . . . . . . . . . : Monday, January 25, 2010 3:12:48 PM

Ethernet adapter Local Area Connection:

Connection-specific DNS Suffix . : hsd1.or.comcast.net.
Description . . . . . . . . . . . : Realtek RTL8139 Family PCI Fast Ethe
rnet NIC
Physical Address. . . . . . . . . : 00-15-F2-8E-BB-A3
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 98.232.162.150
Subnet Mask . . . . . . . . . . . : 255.255.248.0
Default Gateway . . . . . . . . . : 98.232.160.1
DHCP Server . . . . . . . . . . . : 68.87.69.13
DNS Servers . . . . . . . . . . . : 68.87.69.146
68.87.85.98
68.87.78.130

Means I dont have internal correct?

Answer 1

This depends on what you mean by "internal".



If you mean a "loopback" interface that is not attached to an adapter? If so, try "ping 127.0.0.1" which is the usual IP address of loopback.



If you mean an IP address on a network to which you are attached but which does not route to the outside world, then you need some adapter to put that address on. Non-routable addresses are :



10.0.0.0 - 10.255.255.255 (10/8 prefix)

172.16.0.0 - 172.31.255.255 (172.16/12 prefix)

192.168.0.0 - 192.168.255.255 (192.168/16 prefix)

Answer 2

If theres just one PC, your ip address is 98.232.162.150



Although this is a public Ip address, it is usable and won't alter performance in any way. Just have a good software (and even free) firewall like zonealarm or sunbelt kerio ( i prefer zone alarm) and always use a virus scanner too.



http://www.download.com/windows/firewall-software/3150-10435_4-0.html?tag=ltcol;nav



The only case you would want a router is if you have more than one PC sharing this internet connection. For a single system, no issues going without a router.



Short answer; In your case, your public IP address is your internal IP address and no, you don't need to do any further network configuration if you're trying to set up torrenting or peer to peer file sharing.

Answer 3

USB modems normally do not, they work by allocating the IP directly to the connection on the machine. LAN connected ones do, and then allocate a private IP to the machine. Routers have to use a public address of their own, as they need to pass all machines through one address. Regardless of DSL or cable.