What does mean "block of addresses"

I've got a reply by ISP, which I, in all honesty, do no understand.

They told me they allocated a:

"block of public address 123.123.123.123/30" - what does that mean?

Also what is VIP DGW?

thanks

RoutersNetworking

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mrmut

8/22/2022 - Mon

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Pete Long

11/14/2017

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Pete Long

11/14/2017

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DP230

11/14/2017

Maybe your Router/modem's interface will have IP of 123.123.123.121, the other side of ISP has IP address of 123.123.123.122

IP address always go with subnet mask, it defines the number of networks and hosts which a address block can serve.

mrmut

11/14/2017

ASKER

Thanks!

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