What network device selects the best path to route a message, based on the destination

address of the packet ?

What protocols are used at the 4th level of the OSI model?

The regex pattern "[A-Za-z]+[0-9]" matches a string that starts with one or more letters and ends with a digit.

The regex pattern "^\d{3}-\d{3}-\d{4}$" matches a phone number in the format "123-456-7890".

Which option is used with grep to perform a case-insensitive search?

Which metacharacter is used to match the beginning of a line in regex?

What is the purpose of the sed command in Linux?

What does the regex pattern "\d{2,4}" match?

What does the regex pattern "[0-9]+" match?