02: Introducing the Host-To-Host Communications Model

Which two statements about the layered model of communication are true? (Choose two.) - Layering makes communication itself less complex. - Layer processes on a host logically communicate with the same layer processes on another host. - Layer processes on a host are independent and communicate with any of the other layers. - Layering facilitates troubleshooting by making it possible to diagnose and narrow a cause to specific layers. - Layering of functions is only theoretical and not implemented in real-world.

- Layer processes on a host logically communicate with the same layer processes on another host. - Layer processes on a host logically communicate with the same layer processes on another host.

Match the PDU with its description Descriptions: - a Link layer PDU - an Internet layer PDU - the general term for the PDU that is used at the application layer - a Transport layer PDU PDU: - segment - data - frame - packet

- a Link layer PDU -> frame - an Internet layer PDU -> packet - the general term for the PDU that is used at the application layer -> data - a Transport layer PDU -> segment

Which four statements about the lower three layers (Link, Internet, and Transport) of the TCP/IP protocol suite are true? (Choose four.) TCP/IP lower layer protocols... - were designed to make sure that bits are moved over wires or air. - interact directly with users. - were designed to make sure that data reaches the destination host, no matter where it is located. - were designed to make sure that data is adapted to the physical medium used, no matter how many different networks data must traverse. - were designed to make sure that each application gets its data and not that of the other application. - do not include any error reporting.

- were designed to make sure that bits are moved over wires or air. - were designed to make sure that data reaches the destination host, no matter where it is located. - were designed to make sure that data is adapted to the physical medium used, no matter how many different networks data must traverse. - were designed to make sure that each application gets its data and not that of the other application.

Which of the TCP/IP layers would the ISO OSI session layer fit? - Link layer - Internet layer - Transport layer - Application layer

Application layer

Which statement is false regarding the encapsulation process? -Encapsulation is the process used by the sending device to remove one or more of the protocol headers. - Segment is the PDU of the transport layer. - The encapsulation process is performed from top to bottom layer. - Encapsulation increases the size of the PDU.

Encapsulation is the process used by the sending device to remove one or more of the protocol headers.

Which TCP/IP stack layer provides logical addressing? - Link - Transport - Application - Internet

Internet

At which TCP/IP layer does de-encapsulation first occur? - Application - Link - Transport - Internet - Physical

Link

Which of the following options is not a benefit of a layered model of communication? - Better manageability of communication by breaking it into smaller tasks. - Enables varied types of devices and software to communicate with each other. - No overhead of data because of a single header attachment to the data. - Prevent changes in one layer from affecting the other layers.

No overhead of data because of a single header attachment to the data.

Which layer in the OSI model provides path connectivity beyond the local segment? - data link layer - network layer - transport layer - session layer - application layer

network layer

What is the PDU called at the internet layer? - packet - data - segment - frame

packet

Which ISO OSI layer ensures that the application layer of the receiving system will be able to read the information that the application layer of another system has sent? - transport layer - presentation layer - session layer - network layer

presentation layer

To which ISO OSI model layer or layers does the TCP/IP model application layer correspond to? - network - transport - session - session, presentation, and application

session, presentation, and application

Which ISO OSI model layer or layers align to the TCP/IP model transport layer? - network - transport - session - session, presentation, and application

transport

Which ISO OSI layer defines services to the data? - presentation layer - session layer - transport layer - network layer

transport layer