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Jul
25
answered How to boot to tftp grub via a USB drive
Jul
25
comment What is the exact use of a MAC address?
You could replace the underlying layer 2 with something entirely different (though I don't know what) and IP will still work the same. The IP protocol (Layer 3) doesn't care if the individual hosts are addressed beneath by MAC or some other scheme. Of course there is need to maintain IP to MAC mapping - but it's difficult to know if ARP really "belongs" to Layer 3 or Layer 2. The point is the layer 2 protocol doesn't have to be Ethernet and IP doesn't care/need to know what the Layer 2 protocol is.
Jul
24
revised In the context of virtual machines, what's the difference between a reference machine and base image?
added 179 characters in body
Jul
24
comment Debian kernel kills my program
Check /var/log/kern.log, /var/log/dmesg, and /var/log/messages.
Jul
24
answered In the context of virtual machines, what's the difference between a reference machine and base image?
Jul
24
answered Debian kernel kills my program
Jul
24
revised What is the exact use of a MAC address?
added 235 characters in body
Jul
24
comment What is the exact use of a MAC address?
To be pedantic, "packets" are what the IP protocol calls its "Protocol Data Unit" (PDU). The PDU for Layer-2/Ethernet/switches/hubs are called frames. Frames contain IP packets. An IP packet can be fragmented and span more than one frame. The TCP/IP stack on the receiving end is responsible for reassembly, not the switch.
Jul
24
comment What is the exact use of a MAC address?
May be interesting to note that Ethernet originally was a bus medium, where all machines physically shared the same media (this is still true for wireless networks). So logically it works like that.
Jul
24
revised What is the exact use of a MAC address?
added 216 characters in body
Jul
24
comment What is the exact use of a MAC address?
Routers do not use the MAC address to route anything. They use IP addresses. Hubs copy traffic unmodified out of their ports, but this would be called bridging, since the traffic does not traverse over a different network, but over the same network.
Jul
24
comment What is the exact use of a MAC address?
Routers don't care about MAC addresses. They do care about the subnet assignment to each of their at least 2 NICs, but not really about the MAC addresses. They forward (i.e. copy) traffic from one IP to another, not from an IP to a MAC or anything like that.
Jul
24
revised What is the exact use of a MAC address?
added 29 characters in body
Jul
24
answered What is the exact use of a MAC address?
Jul
23
answered Can't access any shared folders even on localhost
Jul
23
answered Is it possible to suspend a socket (SSH session, specifically) to switch network devices?
Jul
22
answered Is the Ask.com toolbar installed with Java considered spyware?
Jul
22
comment Use 2 Mouse Cursors on the same Computer
Yeah I'm playing with it a bit ... won't work like I thought it did. Sorry.
Jul
22
answered Use 2 Mouse Cursors on the same Computer
Jul
22
answered How do you remove bloatware from an unusable PC?