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Closed 9 years ago.
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I want to Know my modem support caller-id and show number or not
I use this AT-command:
AT+FCLASS=?
I know if that response contains 8 support voice but if modem dosnt support voice it means cant support caller-id too?
I use Conexant USB CX93010 ACF Modem
I assume you by caller-id means the supplementary service called CLIP - Calling Line Identification Presentation (for GSM/UMTS networks). You can check if your modem supports this by running AT+CLIP=?. To enable +CLIP: ... unsolicited responses after RING run AT+CLIP=1. Read 27.007 for more details.
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Closed 3 days ago.
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I am trying to detect ARP Poisoning Attack (ARP: Address Resolution Protocol).
I tried this command in CMD:
> arp -a
I would like to know what exactly this command displays and if in the output of this command if I find that two different IP addresses have same MAC address does it mean that ARP Poisoning is happening.
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Closed 8 days ago.
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I'm reading about csma/cd and i think to myself that in a lan with utp it is make sense because it has special pair for sending and special ones for receiving at the same time.
but i think in fiber and coaxil cable! what about them csma/cd can't be applied on the lan based on coaxil or fiber optic?
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Closed 5 years ago.
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Obviously the difference is that one can and one cannot access Netflix. But how does Netflix ban VPNs while not catching VPNs designed specifically to access Netflix?
The main difference is the question of whether Netflix knows about them yet or not.
In time, the VPNs which can access Netflix today will likely end up being blocked by from accessing the service when Netflix's analysis of incoming connections reveals IP addresses which could belong to VPNs used to circumvent their restrictions.
It is possible that some operators of VPN services may make use of IP addresses which are changed periodically to make detection less likely and this is how they may go for an extended period of time without being blocked.
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Closed 5 years ago.
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I know that in LSR, each router sends LSA packet to its neighbors, which is then flooded. But I can't figure out how the routers know the complete topology in this process.
Link state update packets contains information about originating router, its interfaces and neighbors connected via these interfaces, therefore, by collecting and joining this information any router can build graph of the network (or area) to which it belongs.
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Closed 4 years ago.
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I was going through Russell's SS7 guide and was wondering what are SSP actually . Are these the telephone boxes we see on our streets or are they present inside telephone exchanges .
According to "Lan Tutorial With Glossary of Terms: A Complete Introduction to Local Area Networks (Lan Networking Library)" April, 1996:
SS7 messages originate at an SSP [Service Switching Point], which is a telephone switch that places or receives a call. The SSP is usually found at a telco's central office, but SS7 messages may also be used by an enterprise PBX. An ISDN PRI's D channel can also send messages that are compatible with SS7.
So not the little boxes, usually.