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Questions tagged [ip]

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which ip and mac address is added to the header of data packets?

I know that in the Internet layer, the source ip and mac address and destination ip and mac address are added to the header. Is this the ip and mac address of the next router we take to get to the end ...
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0answers
10 views

While considering the wrap around time, why are the headers not considered?

In many texts and places as in here the wrap around time is found as : $$\text{Wrap-Around Time = $\frac{2^{32} \text{ bytes}}{\text{Bandwidth in Bytes/sec}}$} $$ The wrap-around time is defined as ...
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0answers
240 views

Decode TCP Payload data

I'm trying to find out what the data of a packet means. I'm a newbie to networking, and I try to find what's sent in this packet: https://pastebin.com/hZEqjmBx How can I do that? What does that data ...
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1answer
50 views

How private IP address is determined?

Today I presented about IP address during my online class based on Computer Networks by Andrew S. Tanenbaum and during QnA session, I was asked about private IP Address range. ...
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1answer
43 views

Is IP masquerade and Network Address Port Translation(NAPT) the same?

Is IP masquerade and Network Address Port Translation(NAPT) the same? I'm not sure whether it is the same thing or not but I realized the mechanism is almost the same where both IP masquerade and NAPT ...
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2answers
62 views

Why are processes on the internet not required to use TCP or UDP?

Here is an excerpt from Andrew S. Tanenbaum, Computer Networks, 5th edition, Chapter 5 (The Network layer), Page 455: [Fifth, processes on the Internet are not required to use TCP or UDP. If a user on ...
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1answer
25 views

binary representation of ip prefixes

How does an ip prefix 90.0.0.0/4 translate to 0101∗ in binary and 10.0.0.0/2 to ...
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1answer
36 views

network address translation

I'm having some difficulty understanding ip addresses. Let's say: Question Info: private subnet 192.168.0.0/24 IP addresses 212.201.49.1-5 Now, a host 192.168.0.2:1234 retrieves a web page from ...
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1answer
1k views

ip/tcp packet decoding without wireshark

How can we manually read and interpret packets properly without using wireshark? Now from the Ethernet header I know that the Destination MAC Address should be at the 5th byte (after converting bits/...
2
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2answers
4k views

How do web browsers find out the MAC address?

While reading through my textbook, I discovered that if you want to access a particular web page, your web browser will find out the IP address of the web server that hosts the web page and try and ...
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1answer
129 views

All-zeros subnet and All-ones subnet

It is said that practically all-zeros and all-ones subnets are not used. Let us consider an a network $200.200.13.13/25$ Here Network ID is represented by using $25$ bits and Host ID using $32-25=7$ ...
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1answer
230 views

Basic Question in networking - why max data size of ip datagram 65535 BYTES and not 65535 bits?

I recently started computer networks with some understanding of algorithms and discrete mathematics. I am completely new. Kindly elaborate following - data size of ip datagram = 16bits. So with this $...