Communication and internet technologies：練習問題

• a.

  Bandwidth is dynamically shared among multiple users on demand without requiring a prior connection setup phase.

• b.

  Messages are transmitted in a store-and-forward manner where intermediate nodes buffer packets before retransmitting them.

• c.

  A dedicated physical or logical communication path is established and reserved between the sender and receiver for the entire duration of the session.

• d.

  Data is divided into discrete packets that independently traverse the network using varying routes.

• a.IMAP allows multiple devices to stay synchronized with the same mailbox, reflecting changes such as 'read' or 'deleted' status across all clients.
• b.IMAP is a simpler protocol that operates at the Link Layer of the TCP/IP stack.
• c.IMAP does not require an active internet connection to organize local folders.
• d.IMAP is more efficient because it deletes the email from the server as soon as it is downloaded.

• a.It returns a 404 Not Found error to the user's browser.
• b.It broadcasts a message to all devices on the LAN asking for the address.
• c.It queries a higher-level DNS server, such as a root name server.
• d.It requests the user to manually enter the IP address of the domain.

• a.\( 128 \)
• b.\( 32 \)
• c.\( 64 \)
• d.\( 48 \)

• a.To determine the most efficient geographical path for a packet to travel.
• b.To ensure that data packets are encrypted during transmission.
• c.To detect and manage collisions when two devices attempt to transmit data simultaneously.
• d.To translate domain names into IP addresses.

まず自分で答えを書いてから、解説と照らし合わせましょう。

まず自分で答えを書いてから、解説と照らし合わせましょう。

まず自分で答えを書いてから、解説と照らし合わせましょう。

まず自分で答えを書いてから、解説と照らし合わせましょう。

まず自分で答えを書いてから、解説と照らし合わせましょう。