Networking fundamental

Learn CCNA Routing and Switching

Basic Fundamental 1

1. A receiving host has failed to receive all of the segments that it should acknowledge. What can th

Send a different source port number.
Restart the virtual circuit.
Decrease the sequence number.
Decrease the window size.


2. Which fields are contained within an IEEE Ethernet frame header?

Source and destination MAC address
Source and destination network address
Source and destination MAC address and source and destination network address
FCS field


3. Which layer 1 devices can be used to enlarge the area covered by a single LAN segment?

Switch
NIC
Hub
RJ45 transceiver


4. Segmentation of a data stream happens at which layer of the OSI model?

Physical
Data Link
Network
Transport


5. Routers operate at layer . LAN switches operate at layer . Ethernet hubs operate at layer . Word p

3, 3, 1, 7
3, 2, 1, none
3, 2, 1, 7
3, 3, 2, none


6. When data is encapsulated, which is the correct order?

Data, frame, packet, segment, bit
Segment, data, packet, frame, bit
Data, segment, packet, frame, bit
Data, segment, frame, packet, bit


7. You want to implement a network medium that is not susceptible to EMI. Which type of cabling shoul

Thicknet coax
Thinnet coax
Category 5 UTP cable
Fiber-optic cable


8. Acknowledgments, sequencing, and flow control are characteristics of which OSI layer?

Layer 2
Layer 3
Layer 4
Layer 7


9. What is the purpose of flow control?

To ensure that data is retransmitted if an acknowledgment is not received
To reassemble segments in the correct order at the destination device
To provide a means for the receiver to govern the amount of data sent by the sender
To regulate the size of each segment


10. What type of RJ45 UTP cable is used between switches?

Straight-through
Crossover cable
Crossover with a CSU/DSU
Crossover with a router in between the two switches

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