Networking - 101 -Test 1 flash cards-
Graded A
Which of the following functions are performed at the Physical layer of the OSI model?
Host and network identification
Data translation and formatting
Session ID assignment
Data movement across network cables - correct Answer-Data movement across
network cables
Explanation: The Physical layer is concerned with how to transmit data and how to
connect network hosts.
The Presentation layer formats and translates data between systems.
The Network layer identifies hosts and networks by using logical addresses.
The Session layer assigns a session ID to each session to keep data streams separate.
What is the basic purpose of the OSI Physical layer?
Maintain a list of known networks and neighboring routers.
Coordinate rules for sending and receiving electrical signals.
Define when devices have access to the LAN.
Define how physical network devices are identified on a network. - correct Answer-
Coordinate rules for sending and receiving electrical signals.
Explanation: The OSI Physical layer sets standards for sending and receiving electrical
signals between devices.
The Data Link layer defines how physical network devices are identified on a network
and when devices have access to the LAN.
The Network layer maintains a list of known networks and neighboring routers.
The Data Link layer of the OSI model is comprised of two sublayers. Which two are
they?
MAC
PAN
CRC
ARP
LLC - correct Answer-MAC and LLC
Explanation: The Data Link layer is split into the following sublayers:
,The Logical Link Control (LLC) sublayer, which provides the operating system a link to
the device driver.
The Media Access Control (MAC) sublayer, which translates generic network requests
into device-specific terms.
Cyclic redundancy check (CRC) is a mathematical value that helps a receiving device
identify any errors that might have have occurred during transmission.
A personal area network (PAN) is a small network for communication between personal
devices.
Address Resolution Protocol (ARP) is a protocol associated with the Internetwork layer
of the TCP/IP model.
You are implementing a SOHO network for a local business. The ISP has already
installed and connected a cable modem for the business.
The business has four computers that need to communicate with each other and the
internet. The ISP's cable modem has only one RJ45 port. You need to set up the
network within the following parameters:
You must spend as little money as possible.
You must not purchase unnecessary equipment.
Computers need to have a gigabit connection to the network.
New devices should not require management or configuration.
You examine each computer and notice that only one of the four computers has a
wireless NIC. They all have Ethernet NICs.
What should you purchase?
A wireless AP and three new wireless NICs.
An unmanaged switch and CAT 5e cabling.
A new cable modem with a built-in switch and CAT 6a cabling.
A hub and CAT 5e cabling.
A managed switch and CAT 6 cabling. - correct Answer-An unmanaged switch and CAT
5e cabling.
Explanation: You should purchase an unmanaged switch and CAT 5e cabling. Switches
offer guaranteed bandwidth to each switch port and full-duplex communication.
Unmanaged switches are autonomous in their function, requiring no port management
or configuration. CAT 5e cabling supports transfer speeds up to 1,000 Gbps.
Purchasing a new cable modem with a built-in switch would be more expensive than an
unmanaged switch. Additionally, CAT 6a cabling is unnecessary for this type of network.
Because all of the computers already have wired NICs, purchasing a wireless AP and
three new wireless NICs would introduce new costs. The wireless AP would also require
additional management and configuration. Hubs suffer from collisions, so only half-
duplex communication is possible. This also wouldn't support 1,000 Gbps speeds. A
small business with four computers doesn't need the additional features that a managed
switch provides.
, You have a network that uses a logical bus topology. How do messages travel through
the network?
Messages are sent to a central device that forwards them to the destination devices.
Messages are sent directly to the correct destination device.
Messages are broadcast to all devices connected to the network.
Messages travel from one device to the next until they reach the destination device. -
correct Answer-Messages are broadcast to all devices connected to the network.
Explanation: Messages sent using a physical bus topology are broadcast to all devices
on the network.
The device in the middle of a star topology, which is typically a hub, receives the
message and forwards it on to all other devices.
In a ring topology, messages travel from one device to the next until they reach the
destination device.
Which of the following topologies connects all devices to a trunk cable?
Ring
Mesh
Star
Bus - correct Answer-Bus
Explanation: A bus topology connects all devices to a trunk cable.
A ring topology connects neighboring nodes until they form a ring.
A star topology uses a hub or switch to connect all network connections to a single
physical location.
A mesh topology exists when there are multiple paths between any two nodes on a
network.
You have a network that's connected using a physical bus topology. One of the cables
that connects a workstation to the bus breaks.
Which of the following BEST describes the effect that this will have on network
communications?
Only devices on one side of the break will be able to communicate with each other,
while only devices on the other side of the break will be able to communicate with each
other.
Devices on one side of the break will be able to communicate with each other, while
devices on the other side will not be able to communicate.
All devices will be able to communicate.
No devices will be able to communicate.
All devices except the device connected with the drop cable will be able to
communicate. - correct Answer-No devices will be able to communicate.
Graded A
Which of the following functions are performed at the Physical layer of the OSI model?
Host and network identification
Data translation and formatting
Session ID assignment
Data movement across network cables - correct Answer-Data movement across
network cables
Explanation: The Physical layer is concerned with how to transmit data and how to
connect network hosts.
The Presentation layer formats and translates data between systems.
The Network layer identifies hosts and networks by using logical addresses.
The Session layer assigns a session ID to each session to keep data streams separate.
What is the basic purpose of the OSI Physical layer?
Maintain a list of known networks and neighboring routers.
Coordinate rules for sending and receiving electrical signals.
Define when devices have access to the LAN.
Define how physical network devices are identified on a network. - correct Answer-
Coordinate rules for sending and receiving electrical signals.
Explanation: The OSI Physical layer sets standards for sending and receiving electrical
signals between devices.
The Data Link layer defines how physical network devices are identified on a network
and when devices have access to the LAN.
The Network layer maintains a list of known networks and neighboring routers.
The Data Link layer of the OSI model is comprised of two sublayers. Which two are
they?
MAC
PAN
CRC
ARP
LLC - correct Answer-MAC and LLC
Explanation: The Data Link layer is split into the following sublayers:
,The Logical Link Control (LLC) sublayer, which provides the operating system a link to
the device driver.
The Media Access Control (MAC) sublayer, which translates generic network requests
into device-specific terms.
Cyclic redundancy check (CRC) is a mathematical value that helps a receiving device
identify any errors that might have have occurred during transmission.
A personal area network (PAN) is a small network for communication between personal
devices.
Address Resolution Protocol (ARP) is a protocol associated with the Internetwork layer
of the TCP/IP model.
You are implementing a SOHO network for a local business. The ISP has already
installed and connected a cable modem for the business.
The business has four computers that need to communicate with each other and the
internet. The ISP's cable modem has only one RJ45 port. You need to set up the
network within the following parameters:
You must spend as little money as possible.
You must not purchase unnecessary equipment.
Computers need to have a gigabit connection to the network.
New devices should not require management or configuration.
You examine each computer and notice that only one of the four computers has a
wireless NIC. They all have Ethernet NICs.
What should you purchase?
A wireless AP and three new wireless NICs.
An unmanaged switch and CAT 5e cabling.
A new cable modem with a built-in switch and CAT 6a cabling.
A hub and CAT 5e cabling.
A managed switch and CAT 6 cabling. - correct Answer-An unmanaged switch and CAT
5e cabling.
Explanation: You should purchase an unmanaged switch and CAT 5e cabling. Switches
offer guaranteed bandwidth to each switch port and full-duplex communication.
Unmanaged switches are autonomous in their function, requiring no port management
or configuration. CAT 5e cabling supports transfer speeds up to 1,000 Gbps.
Purchasing a new cable modem with a built-in switch would be more expensive than an
unmanaged switch. Additionally, CAT 6a cabling is unnecessary for this type of network.
Because all of the computers already have wired NICs, purchasing a wireless AP and
three new wireless NICs would introduce new costs. The wireless AP would also require
additional management and configuration. Hubs suffer from collisions, so only half-
duplex communication is possible. This also wouldn't support 1,000 Gbps speeds. A
small business with four computers doesn't need the additional features that a managed
switch provides.
, You have a network that uses a logical bus topology. How do messages travel through
the network?
Messages are sent to a central device that forwards them to the destination devices.
Messages are sent directly to the correct destination device.
Messages are broadcast to all devices connected to the network.
Messages travel from one device to the next until they reach the destination device. -
correct Answer-Messages are broadcast to all devices connected to the network.
Explanation: Messages sent using a physical bus topology are broadcast to all devices
on the network.
The device in the middle of a star topology, which is typically a hub, receives the
message and forwards it on to all other devices.
In a ring topology, messages travel from one device to the next until they reach the
destination device.
Which of the following topologies connects all devices to a trunk cable?
Ring
Mesh
Star
Bus - correct Answer-Bus
Explanation: A bus topology connects all devices to a trunk cable.
A ring topology connects neighboring nodes until they form a ring.
A star topology uses a hub or switch to connect all network connections to a single
physical location.
A mesh topology exists when there are multiple paths between any two nodes on a
network.
You have a network that's connected using a physical bus topology. One of the cables
that connects a workstation to the bus breaks.
Which of the following BEST describes the effect that this will have on network
communications?
Only devices on one side of the break will be able to communicate with each other,
while only devices on the other side of the break will be able to communicate with each
other.
Devices on one side of the break will be able to communicate with each other, while
devices on the other side will not be able to communicate.
All devices will be able to communicate.
No devices will be able to communicate.
All devices except the device connected with the drop cable will be able to
communicate. - correct Answer-No devices will be able to communicate.
