Questions tagged [networking]

For questions about networking in general. Any question about all on topic network devices can use this tag.

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26
votes
8answers
15k views

Why does DHCP use UDP and not TCP?

DHCP uses UDP as its transport protocol. DHCP messages that a client sends to a server are sent to well-known port 67 (UDP—Bootstrap Protocol and DHCP). DHCP Messages  that a server sends to a client ...
6
votes
2answers
840 views

is there a difference between Latency and speed ?

so latency is the time it takes for bits to get from the sender to the receiver and the speed is how fast bits travel , so logically the more speed the network has the more low latency it has ...
5
votes
4answers
6k views

Can anyone explain to me the difference between the PSH and URG flags in TCP segment?

According to me when PSH flag is set, it indicates that data will have to be sent immediately to the wire and on receiving side the data has to be pushed to the application immediately. When URG flag ...
4
votes
2answers
301 views

What is the best to simulate an RJ45 cable failure without changing switch configuration or removing the cable?

I am looking at an automation element for a training environment. We would like to be able to fail a cable without doing a shutdown on the interface or having an engineer physically remove the cable ...
3
votes
2answers
1k views

Connect two routers to a single uplink for full redundancy

I have a single uplink with my ISP at a data center. I have 2 routers (CISCO 3850). How do I connect these routers to that uplink WITHOUT a network switch? That switch will be a single point of ...
-1
votes
0answers
29 views

Is there any logic to how IP address topology is organized globally? [duplicate]

IP addresses are designed as 4x8 = 32 bit identifiers, 000.000.000.000, representing a hierarchy of organization. Each level in the hierarchy can store 2^8 = 256 networks. In theory, this design can ...