APCSP CSN-1.C Internet Communication

How is information transmitted over the Internet?

• As a continuous, uninterrupted signal sent directly from the source to the destination

• As a series of small, discrete packets that collectively form a data stream

• As a compressed file that is transferred in a single transmission

• As a direct physical connection between the sender and receiver

What is the primary purpose of encapsulating data into packets?

• To increase the size of the data being transmitted

• To store backup copies of transmitted data for security purposes

• To prevent data from being intercepted by malicious users

• To allow data to be divided, routed, and reassembled efficiently

Which of the following components is NOT typically included in a network packet?

• Destination address

• Source address

• A copy of the entire message being transmitted

• A sequence number for reassembling data

What can happen to packets as they travel through the Internet?

• They always arrive in order and without loss

• They may arrive in order, out of order, or be lost entirely

• They are always delivered in a single batch rather than individually

• They can only be transmitted if they are fully intact at the source

How does metadata in a packet help facilitate communication on the Internet?

• It allows the packet to encrypt itself for security purposes

• It increases the data size to improve network speed

• It provides information needed for routing and reassembly of data

• It ensures that all packets follow the same exact path

Which of the following statements correctly describes the difference between TCP and UDP?

• TCP ensures reliable transmission with error checking and ordered delivery, while UDP is faster but does not guarantee delivery order

• UDP ensures reliable transmission, while TCP provides faster, unordered delivery

• TCP and UDP always use the same routing methods for packet transmission

• TCP and UDP are both unreliable and are never used for Internet communication

What is the main function of the Internet Protocol (IP)?

• To establish a direct connection between two devices before sending data

• To prevent packets from being lost during transmission

• To encrypt all data for secure transmission

• To provide an address system that allows packets to be routed between devices

Which scenario best illustrates the advantages of using UDP instead of TCP?

• A user downloads a software update that must arrive fully intact and in order

• A video call where slight delays or missing packets do not significantly impact communication

• A bank transaction where missing or incorrect data could cause serious errors

• A file transfer protocol that requires precise and accurate data transmission

Why do packets sometimes arrive out of order?

• Packets are sent using different routes, each with varying network speeds and conditions

• The Internet requires all packets to be delayed before delivery

• The sender intentionally rearranges packets before transmission

• The receiving device always processes packets randomly

What happens if some packets are lost during transmission using TCP?

• The receiving device requests retransmission of the missing packets

• The receiving device ignores the missing packets and continues processing

• The sender resends all packets, including those already received

• The transmission is permanently terminated