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3 votes
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Ip address release/renew

When you release your IP address using the ipconfig/release command and then renew with ipconfig/renew, the computer will request and receive the same address you had previously. Why is this so? How ...
Awesome-O 4000's user avatar
3 votes
1 answer
74 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. ...
Nurin Izzati Jafri's user avatar
2 votes
2 answers
7k 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 ...
A.B.S's user avatar
  • 21
1 vote
1 answer
4k 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/...
x89's user avatar
  • 167
1 vote
1 answer
287 views

Why use private IP addresses in a LAN instead of MAC address

Why do we use a private IP address instead of using the MAC address in a local network? It makes sense that we have IP addresses for large networks where packets have to be routed because the IP ...
b0red's user avatar
  • 45
1 vote
1 answer
479 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 $...
Nascimento de Cos's user avatar
1 vote
1 answer
98 views

How does concept of "redirection" works in ICMP?

I am trying to understand this figure, what it is trying to say? What I already know? Routing table is updated dynamically. However, for efficiency, hosts do not take part in the routing update ...
user avatar
1 vote
1 answer
130 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 ...
Nurin Izzati Jafri's user avatar
1 vote
1 answer
55 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 ...
x89's user avatar
  • 167
1 vote
0 answers
40 views

What happens to DNS requests when using a proxy?

First question on this forum. When I'm using a proxy in a browser (not on the whole system) what happens to DNS requests? What I mean is, are DNS requests going through the proxy as well, or are they ...
spartanmode's user avatar
0 votes
1 answer
461 views

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 ...
M G's user avatar
  • 65
0 votes
2 answers
151 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 ...
Nurin Izzati Jafri's user avatar
0 votes
1 answer
40 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 ...
x89's user avatar
  • 167
0 votes
1 answer
272 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 $32-25=7$ ...
Ashish Kankal's user avatar
0 votes
0 answers
46 views

Why does diskless system doesn't contain IP address?

I am studying about RARP. What is the IP address of a given hardware address? Used by diskless systems to find their own IP address. https://www.cse.wustl.edu/~jain/bnr/ftp/f15_arp.pdf So, why do ...
user avatar
0 votes
1 answer
252 views

How many /20-subnets are in the network 130.149.0.0/16?

I'm new to networking so please bear with me. My textbook gives 4 as an answer, but I'm not sure I understand the question: What's a "/20-subnet"? My understanding is that a network mask (/...
Karla's user avatar
  • 181
0 votes
0 answers
1k 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 ...
Alex Stroescu's user avatar
-2 votes
1 answer
33 views

Is IP a property of the device one uses or the router through which one connects to the internet?

Let's say I visit an IP Checker online, is the OP shown there my IP or the IP of my router? I can't seem to find a conclusive authoritative answer online.
Babu's user avatar
  • 259