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IPv6 & Network Layer – MCQ

IPv6 & Network Layer Quiz

1.
Which OSI layer is responsible for routing packets between networks?
Data Link Layer
Network Layer
Transport Layer
Physical Layer
The Network Layer determines the best path for data across networks.
2.
How many bits are used in an IPv6 address?
128 bits
32 bits
64 bits
256 bits
IPv6 addresses are 128 bits long.
3.
IPv6 addresses are written in how many groups of hexadecimal digits?
Eight groups
Four groups
Sixteen groups
Two groups
IPv6 addresses are written as eight groups of four hexadecimal digits separated by colons.
4.
Shorten the IPv6 address: 2001:0db8:0000:0000:0000:ff00:0042:8329
2001:db8::ff00:42:8329
2001:db8:0:0:0:ff00:42:8329
2001:db8:ff00:42:8329
2001::ff00::42:8329
Consecutive zeros can be replaced with "::" once per address.
5.
What is the loopback address in IPv6?
::1
127.0.0.1
::
FE80::1
::1 is the IPv6 equivalent of IPv4 127.0.0.1 loopback address.
6.
Which prefix is used for link-local IPv6 addresses?
FE80::/10
FF00::/8
::1
::/0
Link-local addresses are used for communication on the local link and are auto-configured.
7.
IPv6 multicast addresses use which prefix?
FF00::/8
FE80::/10
::1
::/128
FF00::/8 is reserved for multicast in IPv6.
8.
Which IPv6 address is unspecified?
::
::1
FE80::/10
FF00::/8
:: indicates an unspecified address when a device has not been assigned an IP.
9.
Network Layer provides which addressing type?
Logical addressing
Physical addressing
Frame addressing
MAC addressing
Network Layer uses logical addressing (IP) to identify source and destination devices.
10.
The Data Link Layer is responsible for?
Frame delivery
Packet routing
IP addressing
Segment delivery
Data Link Layer delivers frames using physical addresses (MAC).
11.
When accessing a website hosted in another country, which networks are involved?
Different networks
Same LAN
Same switch
Local host only
Communication between different networks is needed to reach remote servers.
12.
How many groups are used to write an IPv6 address in hexadecimal digits?
8
4
16
10
IPv6 addresses are divided into 8 groups of 4 hex digits each.
13.
How many times can consecutive zeros (::) be used in an IPv6 address shortening?
Once per address
Twice
Unlimited
Never
Consecutive zeros can be replaced with :: **only once** per IPv6 address.
14.
Which OSI layers are concerned with how data is used (7,6,5)?
Upper Layers
Lower Layers
Physical Layers
Data Link Layers
OSI Upper Layers (5–7) handle how data is prepared and used by applications.
15.
Which OSI layers are responsible for moving data across networks (1–4)?
Lower Layers
Upper Layers
Application Layers
Presentation Layers
OSI Lower Layers (1–4) are responsible for data transport across networks.
1.
How many bits does an IPv6 address have?
128 bits
32 bits
64 bits
256 bits
IPv6 uses 128-bit addresses, unlike IPv4 which uses 32 bits.
2.
IPv6 addresses are written in how many groups of hexadecimal digits?
Eight groups
Four groups
Sixteen groups
Two groups
IPv6 addresses have eight groups separated by colons.
3.
What is the loopback address in IPv6?
::1
127.0.0.1
::
FE80::1
::1 is the IPv6 equivalent of IPv4 loopback address 127.0.0.1.
4.
Which IPv6 prefix is used for link-local addresses?
FE80::/10
FF00::/8
::1
::/0
Link-local addresses are auto-configured and used for local network communication.
5.
IPv6 multicast addresses use which prefix?
FF00::/8
FE80::/10
::1
::/128
FF00::/8 is reserved for multicast in IPv6, replacing IPv4 broadcast addresses.

IPv6 Quiz – Interview Questions

6.
How many times can "::" be used to shorten consecutive zeros in an IPv6 address?
Once per address
Twice
Unlimited
Never
The "::" abbreviation for consecutive zeros can only appear once in an IPv6 address.
7.
Which OSI layer uses logical addressing like IP addresses?
Network Layer
Data Link Layer
Transport Layer
Application Layer
Logical addressing is a function of the Network Layer for identifying devices across networks.
8.
Which OSI layers are responsible for moving data across networks (layers 1-4)?
Lower Layers
Upper Layers
Application Layer
Presentation Layer
OSI Lower Layers (1–4) handle data transport, framing, and routing.
9.
Which OSI layers are responsible for preparing and using data (layers 5–7)?
Upper Layers
Lower Layers
Physical Layer
Data Link Layer
OSI Upper Layers handle session management, presentation, and application usage of data.
10.
Name two IPv6 special address types used in networking.
Link-local and multicast
Broadcast and loopback
Private and experimental
Unicast only
IPv6 uses link-local addresses for local communication and multicast addresses instead of broadcast.

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