[Chapter 5 Quiz] Comp 20173 Data Communication And Networking

2.

TCP is a ________ layer protocol.

Explanation
TCP is a transport layer protocol. The transport layer is responsible for the reliable delivery of data across a network. TCP (Transmission Control Protocol) is a widely used transport layer protocol that provides reliable, connection-oriented communication between devices. It ensures that data packets are delivered in the correct order and without errors, using mechanisms such as acknowledgment, retransmission, and flow control. TCP is commonly used in applications such as web browsing, email, file transfer, and streaming media.

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3.

Which protocol provides connectionless network layer services?

IP
TCP
UDP
None of these

Correct Answer

A. IP

Explanation

IP (Internet Protocol) provides connectionless network layer services. This means that IP does not establish a dedicated connection between the sender and receiver before transmitting data. Instead, it breaks the data into packets and sends them independently over the network. Each packet is treated as an individual entity and can take different paths to reach the destination. This approach allows for more efficient and flexible communication, but it also means that packets can be lost or arrive out of order. TCP and UDP are transport layer protocols that rely on IP for network layer services.

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1

4.

Which of the following is true about IP?

It is connection oriented.
It uses application data to determine the best path.
It is used by both routers and hosts.
It is reliable.
None of these

Correct Answer

A. It is used by both routers and hosts.

Explanation

IP (Internet Protocol) is a network protocol that is used by both routers and hosts. Routers use IP to forward data packets between different networks, while hosts (devices such as computers, smartphones, etc.) use IP to send and receive data over a network. IP is responsible for addressing and routing data packets across networks, ensuring that they reach their intended destination. Therefore, the statement "It is used by both routers and hosts" is true.

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5.

What type of routing uses information that is manually entered into the routing table?

Dynamic
Static
None of the above
Both Dynamic and Static

Correct Answer

A. Static

Explanation

Static routing uses information that is manually entered into the routing table. In static routing, the network administrator manually configures the routes and their associated metrics. This type of routing is typically used in small networks or in situations where the network topology is stable and changes infrequently. Static routes do not adapt to changes in the network, so they do not require the exchange of routing information between routers.

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6.

Which of the following are not functions of the network layer? (CHOOSE TWO)

Routing
Addressing packets with an IP address
Delivery reliability
Application data analysis
Encapsulation
Decapsulation

Correct Answer(s)

A. Delivery reliability
A. Application data analysis

Explanation

The network layer is responsible for routing packets and addressing them with an IP address. It is not responsible for delivery reliability or application data analysis. Delivery reliability is ensured at the transport layer, while application data analysis is performed at the application layer. Encapsulation and decapsulation are processes that occur at different layers of the networking model and are not specifically functions of the network layer.

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7.

IP is connectionless and will occasionally drop a packet en route to a destination IP address. If packets are dropped, how will messages be completed?

Only the IP portion of the packet is dropped, but the TCP portion continues to the last router.
The routing protocols will carry the TCP information to the previous-hop router, which sends a reverse notification to the source.
The routing protocols, such as RIP, are connection oriented and will contact the source host.
The destination host is expecting the packet and will send a request if it does not arrive.
The IP header contains the source address so that the packet can be returned by the router that receives the packet when the TTL is 0.

Correct Answer

A. The destination host is expecting the packet and will send a request if it does not arrive.

Explanation

In a connectionless protocol like IP, packets may occasionally get dropped en route to the destination. However, the destination host is still expecting the packet and will send a request if it does not arrive. This means that even if some packets are dropped, the destination host will ensure that the message is completed by requesting the missing packets.

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8.

Why is IP “media independent”?

It encapsulates Layer 1 instructions.
It works the same on all Layer 1 media.
It carries both video and voice data.
It works without Layer 1 media.
None of these

Correct Answer

A. It works the same on all Layer 1 media.

Explanation

IP is "media independent" because it works the same on all Layer 1 media. Layer 1 refers to the physical layer of the network, which includes the physical transmission medium such as copper wires, fiber optic cables, or wireless signals. IP, or Internet Protocol, is a network protocol that operates at a higher layer (Layer 3) and is responsible for addressing and routing data packets across different networks. Regardless of the specific physical media being used, IP treats them all the same and is able to transmit data packets across them without any differentiation.

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9.

What are the key factors to consider when grouping hosts into a common network? (CHOOSE THREE)

Gateways
Purpose
Physical Addressing
Software Version
Geographic Location
Ownership

Correct Answer(s)

A. Purpose
A. Geographic Location
A. Ownership

Explanation

When grouping hosts into a common network, it is important to consider the purpose of the network, as this will determine the specific requirements and configurations needed. Geographic location is another important factor to consider, as it can impact network performance and latency. Ownership is also crucial, as it determines who has control and responsibility for the network. Physical addressing, software version, and gateways are not key factors when grouping hosts into a common network.

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10.

Select THREE PIECES of information about a route that a routing table contains.

Next-hop
Source address
Metric
Destination network address
Last hop
Default gateway

Correct Answer(s)

A. Next-hop
A. Metric
A. Destination network address

Explanation

A routing table contains information about the next-hop, metric, and destination network address for a route. The next-hop is the IP address of the next router or gateway that the packet should be forwarded to. The metric is a value that represents the cost or preference of a route. The destination network address is the IP address or network range that the route applies to. These three pieces of information are crucial for a router to determine the best path for forwarding packets to their intended destination.

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[Chapter 5 Quiz] Comp 20173 Data Communication And Networking

How many bits are in an IPv4 address? ________

Quiz Preview

TCP is a ________ layer protocol.

Which protocol provides connectionless network layer services?

Which of the following is true about IP?

What type of routing uses information that is manually entered into the routing table?

Which of the following are not functions of the network layer? (CHOOSE TWO)

IP is connectionless and will occasionally drop a packet en route to a destination IP address. If packets are dropped, how will messages be completed?

Why is IP “media independent”?

What are the key factors to consider when grouping hosts into a common network? (CHOOSE THREE)

Select THREE PIECES of information about a route that a routing table contains.