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Gateway operates at _________ layer.
I. network
II. transport
III. data link
IV. physical
- a)I and II
- b)I, II and III
- c)II and IV
- d)None of the above
Correct answer is option 'D'. Can you explain this answer?
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Gateway operates at _________ layer.I. networkII. transportIII. data ...
A gateway is normally a computer that operates in all five layers of the Internet or seven layers of OSI model. A gateway takes an application message, reads it, and interprets it. It can be used as a connecting device between two internetworks that use different models.
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Gateway operates at _________ layer.I. networkII. transportIII. data ...
Gateway operates at None of the above layer.
Explanation:
A gateway is a network node that connects two networks using different protocols together. It operates at different layers of the OSI model, depending on the type of gateway and the protocols being used. Therefore, it cannot be confined to a specific layer. Some of the types of gateways and the layers they operate are:
1. Network Gateway: It operates at the network layer (layer 3) of the OSI model. It connects networks that use different network protocols, such as TCP/IP, IPX/SPX, and AppleTalk.
2. Application Gateway: It operates at the application layer (layer 7) of the OSI model. It translates application-level protocols, such as HTTP, FTP, and SMTP, between different networks.
3. Protocol Converter Gateway: It operates at the data link layer (layer 2) of the OSI model. It translates data link layer protocols, such as Ethernet, Token Ring, and FDDI, between different networks.
4. Firewall Gateway: It operates at the network layer (layer 3) of the OSI model. It filters and blocks traffic based on predefined security policies.
Therefore, the correct answer to the given question is 'None of the above'.
Explanation:
A gateway is a network node that connects two networks using different protocols together. It operates at different layers of the OSI model, depending on the type of gateway and the protocols being used. Therefore, it cannot be confined to a specific layer. Some of the types of gateways and the layers they operate are:
1. Network Gateway: It operates at the network layer (layer 3) of the OSI model. It connects networks that use different network protocols, such as TCP/IP, IPX/SPX, and AppleTalk.
2. Application Gateway: It operates at the application layer (layer 7) of the OSI model. It translates application-level protocols, such as HTTP, FTP, and SMTP, between different networks.
3. Protocol Converter Gateway: It operates at the data link layer (layer 2) of the OSI model. It translates data link layer protocols, such as Ethernet, Token Ring, and FDDI, between different networks.
4. Firewall Gateway: It operates at the network layer (layer 3) of the OSI model. It filters and blocks traffic based on predefined security policies.
Therefore, the correct answer to the given question is 'None of the above'.
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Gateway operates at _________ layer.I. networkII. transportIII. data linkIV. physicala)I and IIb)I, II and IIIc)II and IVd)None of the aboveCorrect answer is option 'D'. Can you explain this answer?
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