Access the modem actually shows condition of line to and in your home/business. That's assuming Modem is the problem w/ dying parts in it. Either way... If the numbers are bad there then Nothing else is going to work right or at all. (Side note can turn off or charge LEDs on case on Config page depending on model.)
speed test sites mean little to most users because have no clue how the internet works. Always try testing a few times and more then one test locations near you. This hopefully limits number of hops to get fast speeds.
Ping times often mean little looking at modem/isp problems because ping time effectively waits thru all 10 to 30 hops to whatever site. Many sites Ignore all pings or give low priority to respond.
Tracert may help because the command try to ping out every hop but many routers ignore this and at best time out every time. You can look at first few hops because few to several are in Comcast network before you every see a Peer to see the rest of the world.
Example Typical results of Tracert to CNN from PA and others close to CNN site. (Some names/IP are change for privacy.)
code:
C:\>tracert cnn.com
Tracing route to cnn.com [151.101.129.67]
over a maximum of 30 hops:
1 <1 ms <1 ms <1 ms 192.168.1.1 <-- Your Typical Router IP
2 8 ms 8 ms 8 ms 96.150.77.100 <-- 2 to 7 are in Comcast Network
3 11 ms 10 ms 9 ms po.rur.xxxxxxx.pa.panjde.comcast.net [68.59.78.2]
4 11 ms 10 ms 10 ms 68.85.34.73
5 13 ms 11 ms 12 ms be-201-ar03.ivyland.pa.panjde.comcast.net [96.108.181.21]
6 16 ms 14 ms 15 ms be-33287-cr01.newark.nj.ibone.comcast.net [68.86.93.173] <-- ibone is high speed backbone within comcast
7 14 ms 14 ms 14 ms be-10249-pe03.newark.nj.ibone.comcast.net [68.86.85.90]
8 13 ms 14 ms 14 ms 23.30.206.202 <-- Likely CNN's ISP, Maybe still in Comcast Net
9 14 ms 13 ms 13 ms 151.101.129.67 <-- Likely CNN Router. Most servers are hidden.
Trace complete.
ETA--> That is a Wired connection. WiFi connections can have problems of its own like many on 2.4GHz band using same channel very close to each other. Try setting router to use other WiFi channels. Several free WiFi "sniffer" to show this but can just try several then check speeds. Devices will simple follow the router.
[This message has been edited by theogre (edited 05-23-2019).]
