The OSI model has seven layers and the DoD has four. At which layer does SMTP work in both models?

• Network

• Transport

• Session

• Application

What are IPv6 multicast addresses used for?

• One-to-one communication

• One-to-many communication

• One-to-all communication

• One-to-nearest communication

What is the destination address of a router advertisement?

• ff02::2

• The address of the device that sent the router solicitation

• ff02::1

• The link-local address of the router

Which IPv6 address type is used for one-to-nearest communication?

• Broadcast

• Unicast

• Multicast

• Anycast

Which field is used in an IPv6 header to identify that an extension header follows?

• Next header

• Flow Label

• Destination Address

• Source Address

Which type of IPv6 unicast address is used on the internet?

• Unspecified

• Global

• Loopback

• Link-local

How large is a basic IPv6 header?

• It is variable

• 64 bits

• 40 bytes

• 20 bytes

Which ICMPv6 packet type is used to identify that the hop limit has been exceeded for a packet?

• 2

• 128

• 133

• 3

Approximately, how many /48 networks are available in the current IPv6 global unicast space?

• 4.2 million

• 35 million

• 35 trillion

• 4.2 billion

FTP lets you transfer files across an IP network.

• True

• False