All Questions
103
questions
0
votes
1
answer
44
views
Simple question about NAT [duplicate]
So I am learning about NAT. I understand that it changes IP from public>private and vice versa. From my understanding, when a packet or info gets sent to the public ip towards the private ip, ...
0
votes
1
answer
1k
views
Sharing same IP address inside LAN? [duplicate]
Q: if 2 devices A and B share same ip address in LAN, can device A retrive all messages whose destination is device B?
I think this depends on how the LAN is configured.
If it's wireless then device A ...
- 1
0
votes
1
answer
156
views
How to correctly setup a DHCP server in the following network?
So, I've got the following Network Configuration:
Assume that, on the graph, "PCs" can be any device that needs an IP(apart from a router).
Now, as explained on my title, I want to run a ...
- 1
2
votes
2
answers
130
views
How ARP works [Specific Case]?
After reading about ARP and NAT I'm really confused about putting them to work together.
Let's suppose we have a router A with a public IP of IP(A). Plus, 2 devices behind that router B and C, each ...
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3
votes
3
answers
2k
views
Can you send data in LAN without an IP?
From What I know, IPs are used to communicate b/w two different networks say LAN1 and LAN2... and MACs are used to communicate within a LAN.. I think this because my instructor says that Hubs and ...
- 51
0
votes
1
answer
77
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What are the IP/MAC addresses of requests between 2 different subnets? [closed]
Assume that networks 172.15.10.0/24 and 172.15.11.0/24 are connected through a router with interfaces 172.15.10.254 (MAC3) and 172.15.11.253 (MAC4).
If host A sends a packet through its network ...
0
votes
0
answers
20
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How does a host use its default gateway? [duplicate]
Each host has its own default gateway and uses that to send packets outside of its network. But in each packet, there is only 1 header field for the destination IP address. So, how can that host send ...
0
votes
1
answer
1k
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Cisco Packet Tracer gives "Invalid IP Address" when I assign an address to a router [duplicate]
I was given an exercise where I have an IP address range and I have to configure multiple sub networks from that range. The address is 238.61.192.128 with the mask 255.255.255.128 (/25). I created my ...
- 103
0
votes
2
answers
132
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Why router can't be used for converting different model of network but gateway can do this?
We know that Router can't be used for converting different model (e.g OSI model to TCP/IP or TCP/IP model to OSI) of network. It isn't a multiprotocol converter. But gateway is a highly sophisticated ...
- 398
1
vote
0
answers
527
views
WAN ip address looks like private ip, but whatsmyip shows a public ip address [closed]
Let me preface this by saying that I'm not very good with internet networking, but I tried my best to gather information. So I've been meaning to do some port forwarding to open a server, but I got ...
- 11
1
vote
1
answer
114
views
Must the host IP be contained in Router's subnet?
The settings are:
manually set my host IP: 10.0.1.6/24, gateway: 10.0.0.138/24
they both know each other's MAC (arp -a shows the list) and there is a direct physical connection between them.
From the ...
- 11
2
votes
5
answers
2k
views
How is an IP packet sent to the gateway?
This is some route command output sample:
$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.240.1 0.0.0.0 ...
- 159
2
votes
2
answers
1k
views
It is possible to have multiple webservers running on same port inside one network?
Lets say we have a network A with two webservers inside it, S1 and S2, both hosting a website on port 80. When a client from a different network is addressing A:80, which host inside network A, will ...
- 123
1
vote
1
answer
3k
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Possible causes of ICMP Destination unreachble - Port unreachable
Are there any other causes, apart from the specific port to be reached being closed, that can lead to an ICMP Destination unreachable - Port unreachable message? What are possible reasons for this ...
user74490
0
votes
1
answer
530
views
IP masquerading and NAT
What is the difference between IP masquerading and NAT?
Do both of them have the same limitation?
Does the statement "IP masquerading cannot provide full internet connections to the hosts which ...
- 31