Network Layer Module 8 Quiz

The layer in the TCP/IP model responsible for providing connectivity between devices across a network.

The primary protocol of the network layer, responsible for addressing and routing data packets.

The network layer assigns unique addresses to devices on a network, enabling them to be identified and located.

The process of wrapping data from higher layers into an IP packet, adding header information for routing.

The process of determining the best path for a data packet to reach its destination.

The process of removing the IP header from a packet as it arrives at its destination, revealing the original data.

IP does not establish a persistent connection between sender and receiver before sending data.

IP does not guarantee delivery or the order of packets. It tries its best to deliver them, but there's no guarantee.

IP ensures the packet reaches the correct destination. It uses header information for network layer processing, guiding the packet through the network.

IP is connectionless. It doesn't guarantee delivery, acknowledge receipt, or resend lost data. It's designed for efficient, fire-and-forget packet delivery.

IP is a best effort protocol. It doesn't guarantee packet delivery, error correction, or retransmission. It relies on other protocols for these functions.

IP is media independent. It doesn't care about the physical transmission medium (copper wire, fiber optic, wireless) used at the data link layer or the physical layer.

IP relies on the data link layer to provide the Maximum Transmission Unit (MTU) information. If the packet is too large, it fragments the packet at layer 3.

MTU stands for Maximum Transmission Unit. It's the largest packet size that can be transmitted without fragmentation across a network.

Fragmentation is the process of dividing a large IP packet into smaller units. It can be used to send packets over networks with smaller MTUs, but it can also increase latency.

IPv6 does not fragment packets. It relies on the underlying data link layer to handle packet size limitations.

The process by which a host determines whether to send a packet directly to a destination or through a default gateway.

Devices on the same local network (LAN) as the sending host.

The header of an IPv4 packet contains information about the packet, including its source and destination addresses, protocol type, and time to live. It is read from left to right, with 4 bytes per line.

A 4-bit field in the IPv4 header that identifies the version of the IP protocol used. For IPv4, this field is always 0100.

Devices outside the local network (LAN) of the sending host.

Packets destined for devices on the same local network (LAN) as the sending host.

This field in the IPv4 header is used for Quality of Service (QoS), allowing for prioritization of different types of traffic. It can implement DiffServ or IntServ.

A calculated value that ensures the integrity of the IPv4 header. It detects errors and corruption during transmission.

Packets destined for devices outside the local network (LAN) of the sending host.

A field in the IPv4 header that specifies the maximum number of hops a packet can travel before being discarded. Each router decrements it by one.

A router or layer 3 switch that acts as the exit point for traffic leaving a local network (LAN).

This field in the IPv4 header identifies the next-level protocol that will handle the data payload, such as TCP or UDP.

A default gateway has an IP address on the same network as the host, can forward traffic off the network, and can route to other networks.

Running out of available IPv4 addresses due to the limited address space available under IPv4.

A manually configured route in a routing table, often used to specify the default gateway.

A technique used to overcome the IPv4 address shortage, where multiple private addresses on a local network are mapped to a single public IP address.

IPv6 uses 128-bit addresses, providing a significantly larger address space compared to IPv4's 32-bit addresses.

The IPv6 header is streamlined by removing unnecessary fields like the "Flag", "Fragment Offset", and "Header Checksum" found in IPv4 headers.

The Flow Label field in the IPv6 header is used to identify and prioritize packets belonging to the same data stream, enabling devices to efficiently handle similar traffic.

The Payload Length field indicates the size of the data portion (payload) in an IPv6 packet.

This field specifies the protocol used for the data payload, such as TCP, UDP, or ICMP.

The Hop Limit field in IPv6 is similar to the TTL field in IPv4, representing the maximum number of hops a packet can traverse before being discarded.

Optional headers that can be used for various purposes like fragmentation, security, or mobility support and are placed between the IPv6 header and the payload.

Unlike IPv4 where routers fragment packets if necessary, fragmentation is not handled by routers in IPv6. This task is delegated to the sending host.