VTY line mode
Telnet
line vty
VTY line mode
VTY line mode
Dynamic ACL
The full form of PIN is Personal Identification Number. It is a unique numerical code used to authenticate the identity of an individual accessing a system or service.
The Cisco ISO is the "Operating System" of the Cisco device. The user can configure the device by accessing and changing the configuration in the ISO.
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Pula in mata
Simply stated it could be that your connection is not secure, and others are accessing simultaniously as you do through out the day.
Youtube site might be down when you are accessing it. Or it might be a problem of the Domain Name Server.
Yes that technique is often employed. (I do so at home accessing my basement computer which has a faster connection from my upstairs connection).