When ping time is around 10, maximum delay time is almost same as average but when ping time is around 10,000, maximum delay time is 88 ms even though average is 1 ms like below. Could you tell me what is the reason for this? Success rate is 100 per...

Like below diagram, I am thinking to connect between Routers (Cisco 891F) by 1000Base-SX or LX because the distance between Routers is over 100m. Question is :  Is it necessary to any special configuration for the interface of 1000Base-SX or LX? (e....

Could you tell me what is difference between C891F(C891F-K9) and C891FJ(C891FJ-K9)?

I think there are 2 ways 802.1Q VLAN Trunk Configuration as following. My understanding is just configuration is different but function is same, and [Pattern 1] is used for L3 port, and [Pattern 2] is used for L2 port. Does my understanding is correc...