1.3 The OSI Model

- Physical

At which layer of OSI do hubs operate? - Physical - Layer 3 - Data Link - Internet

- Enabling communication between network clients and services - Integration of network functionality into the host operating system.

In the OSI Model, which of the following functions are performed at the Application Layer? (select All that apply) - Data translation - Enabling communication between network clients and services - Conversation Identification - Integration of network functionality into the host operating system.

- specify data format (such as file formats) - encrypt and compress data

In the OSI Model, which of the following functions are performed at the Presentation Layer? - Maintain separate client connections - transmit data frames - provide network services - specify data format (such as file formats) - encrypt and compress data - Handle general network access, flow control, and error recovery.

Explanation: Device/Function OSI Layer HTTP >>> Application ASCII >>> Presentation Session ID Number >>> Session Port Numbers >>> Transport Router >>> Network Switch >>> Data Link Wireless Access Point >>> Physical

Matching Question - Network Functions/Devices and OSI Model

- Defining a unique hardware address for each device on the network - Letting devices on the network have access to the LAN

Which of the following are functions of the MAC sublayer? (Select two) - Defining a unique hardware address for each device on the network - Letting devices on the network have access to the LAN - Mapping hardware addresses to the link-layer addresses - Creating routing tables based on the MAC addresses

- Movement of data across network cables

Which of the following are performed at the Physical layer of the OSI Model? - Enablement of network services - Provision of an environment in which to run network applications - Movement of data across network cables - Data Translation

- Switch - NIC

Which of the following devices operate at the OSI Model later 2? (Select 2) - Router - Switch - Firewall - Hub - NIC - Repeater

- Switches - Repeaters

Which three of the following devices operate at the Data Link layer of OSI? - Switches - Bridges - NIC - Routers - Repeaters - Hubs

- Identifying physical Drives - Controlling how messages are propagated through the network

Which two of the following are included as part of the Data Link Layer specifications? - Identifying physical Drives - Controlling how messages are propagated through the network - Composition of electrical signals as the pass through the transmission medium - Synchronizing individual bits as they are transmitted through the network

- Data Link

Your company purchases a new bridge, which filters packets based on MAC Address of the destination computer. On which OSI layer is this device functioning? - Data Link - Session - Presentation - Transport

- Network

At what OSI Layer does a router operate to forward network messages: - Data Link - Network - Transport - Physical - Session

- Routes messages between networks

In the OSI Model, what is the primary function of the Network layer? - Transmits data frames - Allows applications to establish, use and end a connection - Routes messages between networks

Explanation: TCP/IP OSI Application >> Application Application >> Presentation Application >> Session Transport >> Transport Internet >> Network Network Interface >> Data Link

Match each layer of the TCP/IP model on the left w the corresponding layer of the OSI Model on the right. Each option on the left can be used more than once.

- MAC - LLC

The Data Link Layer of the OSI Model is comprised of two sublayers. What are they? (select two) - MAC - DLC - LLC - SAN - LAT

- Transport

Which OSI Model layer is responsible for guaranteeing reliable message delivery? - Data Link - Session - Application - Transport