Linked Questions

2
votes
2answers
35k views

At wich layer “routers” work in architecture TCP-IP [duplicate]

Well, i'm studying to a test, based on the following layers: link, internet, transport and application (Architecture TCP-IP) i would like to know which layer or layers "routers" work and why it can't ...
3
votes
2answers
7k views

SSL/TLS belongs to which OSI layer [duplicate]

Can someone please explain SSL/TLS belongs to which OSI layer. I have been looking through many sites and all of them have different options of Application, Presentation and Session.
1
vote
2answers
695 views

OSI and TCP/IP: which is the relation? [duplicate]

In the "network" literature there are always explanations of this two reference models: OSI and TCP/IP. The TCP/IP conceptual model is indeed a "fact" in terms of implementation. Anyone can find the ...
0
votes
1answer
912 views

Dependency between IEEE 802 and OSI model [duplicate]

My question is focussed on IEEE 802.11x for (WLAN) and 802.15.1 (Bluetooth) Wikipedia and other sources underline, that the mentioned IEEE standards just define the PHY and MAC layer from the OSI ...
1
vote
1answer
100 views

What is IP networking used for? Also does the application layer include the actual software? [duplicate]

I have read and learnt the fundamentals about the OSI model and its layers but just wondering is there a difference between the OSI model and IP networking or is it covered by OSI model? Bit confused ...
1
vote
1answer
35 views

Session layer role(with example) in OSI Model [duplicate]

Could someone provide some real world scenerios to understand the role played by session layer in OSI model. Example: Presentation Layer handles zip&unzip etc. Similarly what does session layer ...
0
votes
0answers
24 views

What Invariants/guarantees do various layers of the OSI model provide? [duplicate]

I saw it stated in an answer to this other question What transmission service gurantees does Ethernet give? that every layer of the OSI model provides both "hard" and "soft" guarantees to the layer ...
0
votes
0answers
21 views

how OSI and TCP/IP layers work? [duplicate]

I am really confused by how the layers these model work. I'm not asking about what are their functions. I read that transport layer provides end-to-end of all packet delivery, and networking also ...
0
votes
0answers
17 views

Is OSI model merely used for troubleshooting purpose? [duplicate]

I'm a student and recently started understanding OSI model, from what I understand is that OSI model is just theoretical and not really used in real world. It's mainly for troubleshooting purpose. I'...
0
votes
0answers
15 views

Understanding Layer Model motivation and how it works [duplicate]

Clarification: I already read the answers in OSI Models and Networking Protocols Relantionships question, and doest not resolve my doubts. Good day, I have been studying and reading an introduction to ...
0
votes
0answers
11 views

OSI and TCP/IP models [duplicate]

my name is Alexander. I have problems with English, but I hope you will understand me anyway. I'm preparing for CCNA 200-301 and I have some problems with OSI model. Let me give you a little context. ...
7
votes
5answers
68k views

What layer of the OSI model deals with ports?

I've read that the session layer is also called the ports layer, and a CBT nugget video implied ports were a layer 5 thing. I always thought they were layer 4, just because I guess. (well and tcp ...
5
votes
3answers
62k views

How to know at what OSI Layer(s) does a firewall operate

I understand that Firewalls may operate on different OSI layers depends on the firewall itself. but how can I know if I install specific firewall at what OSI Layer(s) it does operate ?
6
votes
4answers
1k views

OSI layer of Neighbor Discovery Protocol

NDP operates using ICMPv6 and, even though ICMPv6 messages are encapsulated in payload field of IPv6 datagram, ICMPv6 and ICMP are usually considered as network layer protocols. At least, on Wikipedia ...
4
votes
2answers
11k views

Which layer does modem operate and are they still used?

I was searching this for quite long time but I haven't found any satisfying result so my question is basically that, if I understand correctly how modems work and when they are used. I have some more ...

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