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Questions tagged [ip]

18 questions
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2 answers

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 would you (what commands would you use) so that…
Awesome-O 4000
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1 answer

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. 10.0.0.0 – 10.255.255.255 172.16.0.0 – 172.31.255.255 192.168.0.0 –…
Nurin Izzati Jafri
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2 answers

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 connect to it. It will then transfer a copy of the…
A.B.S
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What happens to DNS requests when using a proxy?

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 being handled separately, thus exposing my IP? Does it depend on how a proxy…
spartanmode
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1 answer

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 address is location-dependant. Meaning routers can…
b0red
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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 process because there are terrible number of hosts.…
user141484
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1 answer

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 changes TCP/UDP port and many-to-one relation is…
Nurin Izzati Jafri
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1 answer

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 this: 00* I'm trying to understand it since a while now but I am unable to derive the logic.
x89
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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/bytes). So from this data, I thought it would be…
x89
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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 $2^{16} -1 = 65536$ 16 bit patterns can be…
Nascimento de Cos
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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 diskless system doesn't have IP address? What does…
user141484
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1 answer

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 (/20) is used to give structure to a classless IP-address,…
Karla
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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 router or just the ip and mac address of the…
M G
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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 mean? How do you decode it, or is it crypted or…
Alex Stroescu
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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 machine A decides to use some new transport…
Nurin Izzati Jafri
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