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WorksheetsIEB21703 L01 (BO1)
Total questions: 54
Worksheet time: 15mins
A network administrator is in the Switch(config-line)# mode on a Cisco IOS device and needs to immediately begin configuring the FastEthernet 0/1 interface. What is the most efficient command to enter?
Ctrl+Z, then configure terminal, then interface FastEthernet 0/1
interface FastEthernet 0/1
end, then configure terminal, then interface FastEthernet 0/1
exit, then interface FastEthernet 0/1
Which Cisco IOS command is used to move from User EXEC mode to Privileged EXEC mode?
exit
line console 0
enable
configure terminal
In the TCP/IP model, what is the Protocol Data Unit (PDU) at the Network layer called?
Packet
Bits
Segment
Frame
Which characteristic of the Internet Protocol (IP) means that it does not guarantee that packets will be delivered?
Best Effort
Connectionless
Low Overhead
Media Independent
Which type of copper cabling provides the most effective protection against electromagnetic interference (EMI) and radio frequency interference (RFI)?
Coaxial Cable
Unshielded Twisted-Pair (UTP)
Shielded Twisted-Pair (STP)
Fibre-Optic Cable
What is the decimal equivalent of the binary octet 11010011?
195
201
211
227
Which contention-based media access control method is used by IEEE 802.11 Wireless LANs to prevent simultaneous transmissions?
CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance)
Token Passing
Full-Duplex Communication
CSMA/CD (Carrier Sense Multiple Access with Collision Detection)
When configuring basic security on a Cisco switch, which command applies a strong, encrypted password specifically for accessing privileged EXEC mode?
line vty 0 15
enable secret [password]
service password-encryption
enable password [password]
To create an Ethernet Straight-Through cable, which combination of TIA/EIA-568 wiring standards must be used?
T568B on both ends
A Rollover configuration on both ends
T568A on one end and T568B on the other
T568A on one end and a Rollover on the other
In the context of network topologies, what is a primary characteristic of a full-mesh WAN?
It provides high availability by connecting every end system to every other end system.
It is the most cost-effective and easiest to scale WAN topology.
All branch sites connect to a single central site.
It consists of a series of permanent links between pairs of endpoints.
When a router forwards a packet from a local Ethernet network to a remote Ethernet network, what happens to the Layer 2 and Layer 3 addresses?
The Layer 3 (IP) addresses change at each hop, but the Layer 2 (MAC) addresses remain the same.
The Layer 2 (MAC) addresses change at each hop, but the Layer 3 (IP) addresses remain the same.
Neither the Layer 2 nor the Layer 3 addresses are changed as the packet is forwarded.
Both the Layer 2 and Layer 3 source and destination addresses are changed at each hop.
What is the primary benefit of segmenting messages before they are sent across a network?
It allows a large data stream to be sent without tying up the communication link, and increases efficiency.
It encrypts the data to prevent unauthorized access during transmission.
It ensures that messages arrive at the destination in the correct order.
It compresses the data to reduce the total amount of bandwidth required.
Which of the following is a function of the Physical layer (Layer 1) of the OSI model?
Providing reliable, process-to-process communication.
Encoding frames into a series of electrical, light, or radio signals.
Determining the best path through the network for data.
Exchanging frames between nodes over a common media.
Which of the following best describes the function of the data link layer in the OSI model?
Encoding frames into a series of electrical, light, or radio signals.
Encoding frames into a series of electrical, light, or radio signals.
Determining the best path through the network for data.
Exchanging frames between nodes over a common media.
When a packet is sent from a host on one LAN to a server on a remote network, which addresses are present in the Layer 2 (L2) header of the frame as it leaves the source host?
The source L2 address of the host and the destination L2 address of the default gateway.
The source L2 address of the default gateway and the destination L2 address of the remote server.
The source L2 address of the default gateway and the destination L2 address of the host.
The source L2 address of the host and the destination L2 address of the remote server.
Which field in the IPv4 header is decremented by each router that forwards the packet, and what happens when its value reaches zero?
The Protocol field; the packet is forwarded to the appropriate transport layer protocol.
The Fragment Offset; the packet is reassembled at the destination.
The Header Checksum; the packet is discarded if the checksum does not match.
The Time to Live (TTL); the packet is discarded.
A network requires a copper cabling solution for a factory floor with high levels of EMI from heavy machinery. The connection must support Gigabit Ethernet. Which of the following is the most suitable choice?
Coaxial Cable
Shielded Twisted-Pair (STP) Category 6
Unshielded Twisted-Pair (UTP) Category 5e
Unshielded Twisted-Pair (UTP) Category 3
What is the decimal equivalent of the hexadecimal value C9?
129
108
201
192
How does the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) mechanism used in WLANs differ fundamentally from the CSMA/CD used in legacy Ethernet?
CSMA/CA is a deterministic access method, while CSMA/CD is contention-based.
CSMA/CA sends a jam signal after a collision, while CSMA/CD uses a random backoff timer.
CSMA/CA uses a proactive method to reserve the medium, while CSMA/CD uses a reactive method after a collision occurs.
CSMA/CA operates in full-duplex mode, while CSMA/CD operates in half-duplex.
Which of the following describes the correct encapsulation process as data moves down the TCP/IP model?
The network layer encapsulates a frame into a packet.
The data link layer encapsulates a packet into a frame.
The transport layer encapsulates data into a frame.
The transport layer encapsulates a packet into a segment.
Which statement is correct?
The transport layer encapsulates data into a frame.
The transport layer encapsulates a packet into a segment.
The transport layer encapsulates data into a frame.
The transport layer encapsulates a packet into a segment.
What is the primary reason for the different number of twists in each wire pair within a UTP cable?
To help prevent crosstalk between the wire pairs.
To cancel out EMI and RFI from external sources.
To protect against attenuation over long distances.
To increase the flexibility of the overall cable.
If a host PC has an IP address of 192.168.10.55 with a subnet mask of 255.255.255.0, and it needs to send a packet to a destination with the IP address 192.168.10.1, how does it forward the traffic?
It drops the packet because the destination address is the same as the default gateway.
It forwards the packet directly to its configured default gateway.
It sends the packet on the local media addressed directly to the destination MAC address.
It broadcasts the packet to all devices on the 192.168.10.0 network.
Which statement accurately compares Throughput and Goodput?
Goodput includes all protocol overhead, while Throughput excludes it.
Throughput measures the total rate of data transfer, while Goodput measures only the useful data delivered to the application.
Throughput measures only the useful data delivered to the application, while Goodput measures the total rate of data transfer.
Throughput and Goodput are always equal in any network scenario.
When configuring a banner message on a Cisco switch using the command banner motd #message#, what is the role of the '#' character?
It is a required character that must be used for all banner messages.
It serves as a delimiting character to mark the beginning and end of the message string.
It encrypts the banner message within the configuration file.
It indicates that the banner message is a high-priority system warning.
Which of the following is a primary characteristic of the Internet Protocol (IP) that describes its lack of guaranteed delivery?
Full Duplex
Connection-oriented
Best Effort
Media Independent
What happens to the running-config file on a Cisco switch if the device loses power and the configuration has not been saved?
The running-config is copied to flash memory for later recovery.
The contents of the running-config file are lost.
The switch will load the running-config from its last saved state on the next boot.
The running-config is automatically saved to the startup-config upon power loss.
In the context of the TCP/IP model, which layer is responsible for determining the best path through a network for a packet?
Internet
Application
Transport
Network Access
What is the primary advantage of segmenting messages into smaller pieces before transmission over a network?
It eliminates the need for physical addressing at the data link layer.
It guarantees that all pieces will arrive at the destination in the correct order.
It ensures that only the lost segments need to be retransmitted, increasing efficiency.
It reduces the total amount of protocol overhead added during encapsulation.
Which statement is correct regarding topology types?
A physical topology shows how devices are cabled, while a logical topology shows the path data frames take.
A physical topology depicts the flow of electricity, while a logical topology depicts the flow of light.
A physical topology depicts the flow of electricity, while a logical topology depicts the flow of light.
A physical topology shows how devices are cabled, while a logical topology shows the path data frames take.
A network device has a prompt that reads Router#. Which Cisco IOS mode is currently active?
User EXEC Mode
Interface Configuration Mode
Global Configuration Mode
Privileged EXEC Mode
Which component of an operating system is responsible for direct communication between the hardware and software?
The GUI
The Shell
The Terminal Emulation Program
The Kernel
Which network communication method involves a single source sending a message to a specific group of interested destinations, but not all devices on the network?
Anycast
Unicast
Multicast
Broadcast
Which of the following is a benefit of using a layered network model?
It prevents changes in one layer from affecting other layers.
It combines all communication functions into a single, efficient protocol.
It ensures that all networks must use proprietary hardware from a single vendor.
It increases the speed of data transmission by reducing protocol overhead.
What is a network?
A group of devices connected together
A single computer
A set of unrelated devices
None of the above
What is the function of a router?
To connect multiple networks
To store data
To print documents
To convert analog to digital
Which device forwards data based on MAC addresses?
Router
Switch
Repeater
Firewall
What does LAN stand for?
Local Area Network
Large Area Network
Line Access Network
Logical Area Node
What is the purpose of the OSI model?
To standardize network communication
To speed up networks
To build hardware
To store data
Which OSI layer handles logical addressing?
Transport
Network
Data Link
Session
Which cable type uses light for transmission?
Coaxial
Fiber optic
Twisted pair
STP
Which topology connects every device to every other device?
Bus
Star
Mesh
Ring
Which protocol is responsible for reliable communication?
UDP
TCP
ICMP
ARP
What does IP stand for?
Internet Protocol
Internal Process
Internet Path
Information Packet
What is throughput?
Actual data transmission rate
Maximum speed
Delay time
Error rate
What is ping used for?
Check connectivity
Transfer files
Restart network
Encrypt data
What layer does TCP operate at?
Transport
Network
Data Link
Physical
What is half-duplex?
Both transmit and receive but NOT at the same time
Only transmit
Only receive
Both transmit and receive simultaneously
How many bits are in an IPv4 address?
16
64
32
128
What is the function of a modem?
Modulate and demodulate signals
Store data
Assign IPs
Boost WiFi
What is the Transport Layer responsible for?
End-to-end communication
Routing
Framing
Encoding
What is line encoding?
A method to represent bits on media
A security method
A compression method
A routing method
Which topology has a single point of failure?
Star
Mesh
Ring
Bus
What is the speed of Fast Ethernet?
100 Mbps
10 Mbps
1 Gbps
10 Gbps
