Nokia Network Routing Specialist I (NRS
I) Certification Exam Prep (Latest
Update) Qs & As| Grade A| 100% Correct
(Verified Answers)
Which technologies can be used with Ethernet switches to achieve redundancy?
(Choose two) - ANSWER>>LAG / STP
In what type of network is a broadcast storm likely to occur? - ANSWER>>An
Ethernet network with redundant paths not running STP.
What problems was Spanning Tree Protocol (STP) primarily designed to solve?
(Choose two): - ANSWER>>Providing path redundancy / Preventing loops
Which of the following is a feature of a VLAN? - ANSWER>>A VLAN can separate
ports on the same switch into different broadcast domains.
What is required if devices on different VLANs with to communicate with each
other? - ANSWER>>Devices on different VLANs can communicate with each other
if there is an IP router to connect the VLANs.
The 24 port Ethernet switch is configured with VLAN 100 on ports 1 - 8, VLAN 200
on ports 9 - 16 and VLAN 300 on ports 17 -24. Which of the following describes
the behavior of the switch when a broadcast frame is received on port 1? -
ANSWER>>The switch will flood the broadcast frame on ports 2 to 8.
The method by which Ethernet frames are associated to a specific VLAN is
referred to as: - ANSWER>>Tagging
,What information is used to separate VLANs on a VLAN trunk that connects
multiple VLANs? - ANSWER>>VLAN tag
Using Q-in-Q Virtual Local Area Network (VLAN) stacking, how does a carrier
differentiate one customers traffic from that of another? - ANSWER>>The PE
switch adds a second VLAN tag to identify the customers traffic on the carriers
network.
What is the purpose of the Data Link Layer in the OSI model? - ANSWER>>The
Data Link Layer is responsible for encapsulating the packet into a frame for
transmission on the transmission media.
Which of the following is typically a characteristic of Layer 2 framing? -
ANSWER>>Provides error checking of the frame contents after transmission.
Which of the following is NOT an example of a Layer 2 protocol? - ANSWER>>IP
Why is the address field in a PPP header always set to "11111111"? -
ANSWER>>PPP supports point-to-point networks only. The address field is fixed.
Which ATM adaptation layer is commonly used for transporting IP datagrams or
non-real time data? - ANSWER>>AAL5
Which of the following is a characteristic of ATM? - ANSWER>>- Application data
is transported in 53-byte cells.
- ATM circuits are identified by a VPI/VCI value.
- Provides enhanced QoS support with 5 classes of service.
- Ideal for multiple services on the same physical line.
What is the basic unit of framing in SONET and the bit rate for its transmission? -
ANSWER>>STS-1 with a bit rate of 51.84
, What is the basic unit of framing in SDH and the bit rate for its transmission? -
ANSWER>>STM-1 with a bit rate of 155.52 Mbit/s
Which of the following are examples of Time Division Multiplexing (Choose two)?
- ANSWER>>SONET/SDH & E1 carrier
How many DS-3 frames can be transported in an OC-3 frame? - ANSWER>>3
Who was responsible for developing and publishing the original standard that was
used for 10Mbit/s Ethernet? - ANSWER>>DEC-Intel-Xerox
Which Ethernet frame field does the receiver use to verify the integrity of the
received bits? - ANSWER>>Frame check sequence
How is Ethernet II different from Ethernet 802.3? - ANSWER>>In Ethernet II the 2
bytes after the source MAC address is used as a type indicator. In Ethernet 802.3
these two bytes indicate the length of the frame.
Given the Mac Adress 00-20-60-ce-2b:28, which part is the Organizationally
Unique Identifier (OUI)? - ANSWER>>00-20-60
Which of the following type of addressing scheme delivers information from one
source to all the devices who are members of a specific group? -
ANSWER>>Multicast
Which of the following is true of Ethernet half-duplex transmission? -
ANSWER>>Half-duplex transmission is only 30-40% efficient because of collisions.
What is the meaning of carrier sense in CSMA/CD algorithm? - ANSWER>>The
host will only transmit data when it detects that no other devices are
transmitting.
I) Certification Exam Prep (Latest
Update) Qs & As| Grade A| 100% Correct
(Verified Answers)
Which technologies can be used with Ethernet switches to achieve redundancy?
(Choose two) - ANSWER>>LAG / STP
In what type of network is a broadcast storm likely to occur? - ANSWER>>An
Ethernet network with redundant paths not running STP.
What problems was Spanning Tree Protocol (STP) primarily designed to solve?
(Choose two): - ANSWER>>Providing path redundancy / Preventing loops
Which of the following is a feature of a VLAN? - ANSWER>>A VLAN can separate
ports on the same switch into different broadcast domains.
What is required if devices on different VLANs with to communicate with each
other? - ANSWER>>Devices on different VLANs can communicate with each other
if there is an IP router to connect the VLANs.
The 24 port Ethernet switch is configured with VLAN 100 on ports 1 - 8, VLAN 200
on ports 9 - 16 and VLAN 300 on ports 17 -24. Which of the following describes
the behavior of the switch when a broadcast frame is received on port 1? -
ANSWER>>The switch will flood the broadcast frame on ports 2 to 8.
The method by which Ethernet frames are associated to a specific VLAN is
referred to as: - ANSWER>>Tagging
,What information is used to separate VLANs on a VLAN trunk that connects
multiple VLANs? - ANSWER>>VLAN tag
Using Q-in-Q Virtual Local Area Network (VLAN) stacking, how does a carrier
differentiate one customers traffic from that of another? - ANSWER>>The PE
switch adds a second VLAN tag to identify the customers traffic on the carriers
network.
What is the purpose of the Data Link Layer in the OSI model? - ANSWER>>The
Data Link Layer is responsible for encapsulating the packet into a frame for
transmission on the transmission media.
Which of the following is typically a characteristic of Layer 2 framing? -
ANSWER>>Provides error checking of the frame contents after transmission.
Which of the following is NOT an example of a Layer 2 protocol? - ANSWER>>IP
Why is the address field in a PPP header always set to "11111111"? -
ANSWER>>PPP supports point-to-point networks only. The address field is fixed.
Which ATM adaptation layer is commonly used for transporting IP datagrams or
non-real time data? - ANSWER>>AAL5
Which of the following is a characteristic of ATM? - ANSWER>>- Application data
is transported in 53-byte cells.
- ATM circuits are identified by a VPI/VCI value.
- Provides enhanced QoS support with 5 classes of service.
- Ideal for multiple services on the same physical line.
What is the basic unit of framing in SONET and the bit rate for its transmission? -
ANSWER>>STS-1 with a bit rate of 51.84
, What is the basic unit of framing in SDH and the bit rate for its transmission? -
ANSWER>>STM-1 with a bit rate of 155.52 Mbit/s
Which of the following are examples of Time Division Multiplexing (Choose two)?
- ANSWER>>SONET/SDH & E1 carrier
How many DS-3 frames can be transported in an OC-3 frame? - ANSWER>>3
Who was responsible for developing and publishing the original standard that was
used for 10Mbit/s Ethernet? - ANSWER>>DEC-Intel-Xerox
Which Ethernet frame field does the receiver use to verify the integrity of the
received bits? - ANSWER>>Frame check sequence
How is Ethernet II different from Ethernet 802.3? - ANSWER>>In Ethernet II the 2
bytes after the source MAC address is used as a type indicator. In Ethernet 802.3
these two bytes indicate the length of the frame.
Given the Mac Adress 00-20-60-ce-2b:28, which part is the Organizationally
Unique Identifier (OUI)? - ANSWER>>00-20-60
Which of the following type of addressing scheme delivers information from one
source to all the devices who are members of a specific group? -
ANSWER>>Multicast
Which of the following is true of Ethernet half-duplex transmission? -
ANSWER>>Half-duplex transmission is only 30-40% efficient because of collisions.
What is the meaning of carrier sense in CSMA/CD algorithm? - ANSWER>>The
host will only transmit data when it detects that no other devices are
transmitting.
