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Closed 7 years ago.
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If I open the port 22 in my home router so I can connect from the outside and I have three computers behind that router with the port 22 open where would my connection end up? In which of the three computers?
It depends on the router (configuration/software). In most cases it wont go anywhere. To have control over it you will need to redirect the traffic from port 22 to a specific IP address from the router settings.
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When you configurate some interface for a device using 'ifconfig eth0 xxx.xxx.xxx.xxx up' what's the difference bettween using IP like '192.168.0.2' and '192.168.0.2/30'.
I understand the idea of a submask and that it's good use for redirect datagrams only taking part of the IP address but I dont get why using it when assinging the IP for some interface.
I found out that using the submask when for assigning the IP address establish the range for the broadcast direction.
So using direction like '192.168.0.2' will establish broadcast on '192.168.0.255' but using '192.168.0.2/30' will use '192.168.0.3' since its the last avaible direction when you taking the first 30 bits.
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I have mounted two ethernet adapter on my pc and each of them has connected to a seperate network. The problem is that only one of them is active at a same time. In other verb I can ping only through one of them at the same time and if l want to ping another network l should disable the first adapter. So now l want to know how can I use both of them same time.
Avoid assigning multiple adapters in the same computer to the same subnet.When configuring multiple NICs, each NIC should communicate with a different subnet. Configuring two or more NICs on the same subnet may cause communication problems. Delve deeper in this article. There're also example scenarios using two adapters
Also you just can assign 192.168.0.16 to the first adapter, and 192.168.1.16 to another
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Closed 8 years ago.
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I know they are address schemes used in different layers, and that IPV4 is 32 bits while MAC is 48 bits.
My questions are:
Why do we need two different address schemes?
What is the problem if we decided to use the same address for both purposes?
Is there a reason for the MAC address requiring more memory?
Has the introduction of ipv6 changed anything?
MAC addresses is a Layer 2 Address, while IP is a Layer 3 Address.
Layer 1 is phisical layer
Layer 2 is data link layer ---> MAC ADDRESS
Layer 3 is Network Layer ---> IP Address
http://en.wikipedia.org/wiki/OSI_model
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Closed 8 years ago.
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It's well known there is the IP address (ipv4 or ipv6) and the MAC address, but does it exist another addresses?
IP address and MAC are related to Network Interfaces (Wifi interface, Ethernet ,PPP..), and PC could have many interfaces .
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Closed 9 years ago.
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In my house I have about eight walljacks with RJ45 ports for direct internet connection. A modem from my ISP is connected to a switch which supplies internet connection to those end points. On one of my end points in a central room I have installed a NetGear router. My TV and other devices are connected to the switch directly.
The question is how to force my TV or other devices to connect to the internet through the NetGear router?
Configure the TV (or other devices) with a static IP address and set the NetGear router as the Default Gateway.