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In which protocol does router use to advertise itself and the network(including the name of the netwrok, like hotspot)?
I haven't found it on the interent, do you have any ideas?
If you refer to Wireless APs, they advertise themselves using the IEEE 802.11 standard. Particularly, beacon frames are used. You can check these frames on Wireshark captures: https://wiki.wireshark.org/SampleCaptures#Wifi_.2F_Wireless_LAN_captures_.2F_802.11
On the other hand, if you mean over the wire, as you have been already told, they do not advertise their name. In IPv6 there is the NDP protocol which advertises routers, but not their names. However, you can use reverse DNS query to obtain the DNS name of a router, so maybe you refer to that.
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so, I have been struggling to figure out how to do port forwarding with a gryphon router
when going to the default gateway link thing it seems not to have an option for anything, including port forwarding, which i expected to exist.
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Closed 4 years ago.
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we need to reroute mail as xmpp packet from postfix to tigase server. Does anyone help.
I need to write a milter for postfix similar to http://www.postfix.org/addon.html#fax
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Closed 8 years ago.
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I know that routers are used to send data between distinct networks, but am wondering if they recognize what type of data (i.e., image, emails) they are transmitting.
No, generally routers know service type instead of data type because of well-known ports. Routes focus on how to forward bytes between different networks, a problem like which path is better.
Let's take a look at tcp/ip protocol. Router is a device operates at the 3rd layer(internet). Only processes that work in application layer do care data type.
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Closed 8 years ago.
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so I am planning to make a network analyzer using Perl. But before I start I have to answer this question, can a Perl program actually sniff packets in multiple NICs simultaneously? a feature of the program im going to make is that it needs to sniff the packets in the whole LAN within a switch. Is this possible in Perl?
Sniffing packets in the whole lan is not possible. It is only possible if your switch supports it. Many swith has an option to copy all traffic to one of its port for monitoring/sniffing.
http://en.wikipedia.org/wiki/Port_mirroring
http://www.miarec.com/knowledge/switches-port-mirroring
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Closed 8 years ago.
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let's say I have a 2-Mbyte chip and need to construct a 8-Mbyte memory. I need to show the address lines in a diagram and explain what the address lines are used for. How would I go about doing this?
If I remember correctly you could make it with 4 2-Mbyte chips.
The first 2 bits of the address are used to select which chip you need. Then the rest of the address is sent to the selected chip.