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WorksheetsNetworking Fundamentals Worksheet
Total questions: 72
Worksheet time: 36mins
Which of the following is a PDU at the Physical layer?
Bits
Frames
Packets
Segments
Which two statements describe the services provided by the data link layer? (Choose two.)
It manages the access of frames to the network media.
It packages various Layer 3 PDUs into a frame format that is compatible with the network interface.
It determines the best path through the internetwork.
It assigns IP addresses to end devices.
Which switching method uses the CRC value in a frame?
Store-and-forward
Cut-through
What information does the loopback test provide?
The TCP/IP stack on the device is working correctly.
The network interface card is functioning correctly.
The default gateway is reachable.
DNS resolution is operational.
Within a production network, what is the purpose of configuring a switch with a default gateway address?
It is used to forward packets originating from the switch to remote networks.
It enables the switch to perform routing between VLANs.
It prevents broadcast storms on the local network.
It assigns IP addresses to hosts automatically.
What property of ARP causes the NICs receiving an ARP request to pass the data portion of the Ethernet frame to the ARP process?
The EtherType field value 0x806 appears in the header of the Ethernet frame.
The destination MAC address is a unicast address.
The frame contains a TCP segment.
The TTL field indicates ARP.
Which statement describes the treatment of ARP requests on the local link?
They are received and processed by every device on the local network.
They are forwarded only by routers to remote networks.
They are discarded by all devices except the destination host.
They are converted into ICMP echo requests.
What is the usable number of host IP addresses on a network that has a /29 mask?
6
8
14
30
What is the network address for 174.184.244.16/29? (Write your answer in decimal format, octets must be divided with dot.)
174.184.244.16
174.184.244.8
174.184.244.24
174.184.244.32
Which two things can be determined by the ping command? (Choose two.)
The destination device is reachable through the network.
The average time for the round-trip between source and destination.
The maximum transmission unit (MTU) of the path.
The MAC address of the default gateway.
What is the main advantage of TCP over UDP?
TCP provides reliable, ordered, and error-checked delivery of data, unlike UDP.
TCP offers lower latency than UDP for streaming applications.
TCP uses broadcast addressing for faster delivery.
TCP does not require port numbers.
How many subnets will be created if you borrow 4 bits from the host portion of an address?
16
4
8
32
What is the first usable host address for 192.208.112.166/27? (Write your answer in decimal format, octets must be divided with dot.)
192.208.112.161
192.208.112.160
192.208.112.162
192.208.112.190
The ___ port number is associated with the originating application on the local host. The ___ port number is associated with the ___ application on the remote host.
Source; destination
Destination; source
Source; source
Destination; destination
When retrieving email messages, which protocol allows for easy, centralized storage and backup of emails that would be desirable for a small-to-medium sized business?
IMAP
POP3
SMTP
FTP
A network administrator establishes a connection to a switch via SSH. What characteristic uniquely describes the SSH connection?
Remote access in which data is encrypted during the session
Remote access in which data is sent in clear text
A protocol used only for file transfers
Access limited to console-only connections
What kind of threat is described when a threat actor impersonates another person to obtain credit information about that person?
Identity theft
Phishing
Denial of service
Eavesdropping
A technician has established a remote connection to router R1 to observe debug output. The technician enters the debug ip icmp command then pings a remote destination. However, no output is displayed. Which command would the technician have to enter to display log messages on a remote connection?
terminal monitor
logging console
show debugging
debug ip udp
Which of the following describes the function of the SVI on a switch?
The SVI provides a virtual interface for remote access to the switch.
The SVI enables routing between autonomous systems.
The SVI is used only for PoE power delivery.
The SVI replaces all physical interfaces on the switch.
Which TCP/IP model layer combines the OSI Data Link and Physical layers?
Network Interface (Link) layer
Transport layer
Internet layer
Application layer
Which type of fiber is used for long-distance, high-bandwidth communication with minimal modal dispersion?
Single-mode fiber (SMF)
Multimode fiber (MMF)
Plastic optical fiber (POF)
Copper twinax
Which is a multicast MAC address?
01:00:5E:00:00:FB
00:1A:2B:3C:4D:5E
FF:FF:FF:FF:FF:FF
00:50:56:AB:CD:EF
What routing table entry has a next hop address associated with a destination network?
Remote routes
Directly connected routes
Local interface routes
Loopback routes
Which three characteristics are defined by the Physical layer? (Choose three.)
Encoding
Physical components
Signaling
Path determination
End-to-end flow control
Which OSI layer uses MAC addresses for communication?
Data Link layer (Layer 2)
Physical layer (Layer 1)
Network layer (Layer 3)
Transport layer (Layer 4)
What is the broadcast address for the subnet that includes 149.218.25.148/26? (Answer in dotted decimal format.)
149.218.25.255
149.218.25.191
149.218.25.159
149.218.25.127
Arianna found a flash drive, plugged it into her laptop, and later noticed her laptop camera was active. What type of attack is described?
Phishing attack
Malware attack
DDoS attack
Social engineering
George set up a simple FTP server with a weak password to share a large video. Later, IT discovered his workstation was compromised and used to upload documents to the internet. What type of attack is described?
Access attack
Passive reconnaissance
Physical tampering
Wireless interference
Convert the decimal number 184 to hexadecimal.
A8
B8
C0
D4
Which network feature is designed to protect data confidentiality during transmission?
Compression
Authentication
Encryption
Address translation
What does the term throughput indicate?
Maximum theoretical bandwidth
The measure of bits successfully transferred across the media over a given period of time
Latency between two endpoints
Average CPU utilization of a router
Given a /32 Global Routing Prefix and a /64 prefix, how many bits are allocated for the Subnet ID?
16
24
32
64
An administrator has just changed the IP address of an interface on an IOS device. What else must be done in order to apply those changes to the device?
Nothing; configuration changes take effect after the command is entered and the Enter key is pressed
Reload the device to apply the new interface address
Save the running configuration to NVRAM and then reboot
Disable and re-enable the interface to commit the change
Which three acronyms represent standards organizations? (Choose three.)
IANA
IEEE
IETF
FTP
DHCP
Which three layers of the OSI model provide services similar to the application layer of the TCP/IP model? (Choose three.)
Application layer
Presentation layer
Session layer
Transport layer
Network layer
When the store‑and‑forward method of switching is in use, what part of the Ethernet frame is used to perform an error check?
CRC in the trailer
Destination MAC address
Type/Length field
Preamble
What are two services provided by the OSI network layer? (Choose two.)
Routing packets toward the destination
Encapsulating PDUs from the transport layer
Path determination between networks
Error detection within frames
Media access control
What is the network address for 149.218.25.148/26? (Answer must be in dotted-decimal notation.)
149.218.25.128
149.218.25.160
149.218.25.192
149.218.25.144
What is the network address for 192.208.112.166/27? (Answer must be in dotted-decimal notation.)
192.208.112.160
192.208.112.128
192.208.112.192
192.208.112.224
What is the definition of bandwidth?
The amount of data that can flow from one place to another in a given amount of time
The time it takes for a packet to travel from source to destination
The number of devices that can share a medium
The range of frequencies used by a signal
Which statement is true about the CSMA/CD access method used in Ethernet?
All network devices must listen before transmitting
Devices transmit simultaneously and collisions are ignored
A central controller schedules all transmissions
Only full‑duplex links use CSMA/CD
What message is sent by a host to check the uniqueness of an IPv6 address before using that address?
Neighbor Solicitation
Router Advertisement
Echo Request
Redirect
Which statement is true about CDP on a Cisco device?
CDP can be disabled globally or on a specific interface
CDP is required for IPv4 routing to function
CDP only operates on serial interfaces
CDP cannot be disabled
Which layer of the OSI model is responsible for logical addressing and routing?
Network layer
Transport layer
Data Link layer
Application layer
Which media access control method is used in legacy Ethernet LANs?
Carrier Sense Multiple Access/Collision Detection (CSMA/CD)
Token passing
Polling
Time Division Multiple Access (TDMA)
Which two types of IPv6 messages are used in place of ARP for address resolution? (Choose two.)
Neighbor Solicitation
Neighbor Advertisement
Echo Request
Router Solicitation
Redirect
What are two functions of NVRAM? (Choose two.)
It retains contents when power is removed
It stores the startup configuration file
It holds the current routing table
It provides temporary packet buffering
It stores interface MAC addresses
What is the hexadecimal equivalent of 202?
CA
C2
CB
B2
What is the usable number of host IP addresses on a network that has a /23 mask?
510
512
254
1022
By following a structured troubleshooting approach, a network administrator identified a network issue after a conversation with the user. What is the next step the administrator should take?
Establish a theory of probable causes
Verify full system functionality
Document findings and actions
Escalate the issue immediately
Which process failed if a computer cannot access the internet and received an IP address of 169.254.142.52?
DHCP failed and the host used APIPA
DNS resolution failed
NAT translation failed
Default gateway is misconfigured
Which layer of the OSI model establishes, manages, and terminates sessions between applications?
Session layer (Layer 5)
Transport layer (Layer 4)
Presentation layer (Layer 6)
Application layer (Layer 7)
Which two modes must you enter before configuring a switch hostname? (Choose two.)
Privileged EXEC mode
Global Configuration mode
ROM monitor mode
User EXEC mode
Setup wizard mode
Which function is provided by the Presentation layer of the OSI model?
Data translation and formatting
Encryption and decryption
Compression and decompression
Session establishment
What is a characteristic of a WAN hub-and-spoke topology?
Each branch site connects to every other branch site directly
Branch sites are connected to a central site through point-to-point links
All sites share a single common bus segment
Branch sites connect via a full mesh of redundant links
During the encapsulation process, what occurs at the data link layer for a PC connected to an Ethernet network?
The IP address is added
The physical (MAC) address is added
The port number is added
The data is encrypted
Which LAN topology is considered a hybrid topology?
Bus
Ring
Extended star
Mesh
Which type of UTP cable is used to connect a PC to a switch port?
Crossover
Straight-through
Rolled (console)
Shielded patch
Which OSI layer segments data into smaller chunks so many different communications can be interleaved on the same network?
Network layer (Layer 3)
Transport layer (Layer 4)
Data Link layer (Layer 2)
Physical layer (Layer 1)
What are two actions performed by a Cisco switch? (Choose two.)
Builds and maintains a MAC address table using source MAC addresses from incoming frames
Routes packets based on the destination IP address
Forwards frames using the destination MAC address via the MAC address table
Segments networks using Layer 3 subnets
Which elements are required to scale to a larger network? (Choose two.)
Network documentation
Adequate budget
Static IP addressing only
Elimination of VLANs
What are two functions of end devices on a network? (Choose two.)
They originate the data that flows through the network
They provide the interface between humans and the communication network
They assign IP addresses to other devices
They forward frames based on MAC address tables
At a minimum, which address is required on IPv6-enabled interfaces?
Global unicast address (GUA)
Unique local address (ULA)
Link-local address
Anycast address
Which dynamic addressing method for IPv6 global unicast addresses relies solely on a DHCPv6 server for addressing information?
SLAAC (Stateless Address Autoconfiguration)
SLAAC with DHCPv6 for other information
Stateful DHCPv6
Manual addressing
Which two statements are true regarding the user EXEC mode of a Cisco device? (Choose two.)
The device prompt ends with the > symbol
Only some aspects of the configuration can be viewed
Full configuration changes can be made
The prompt ends with the # symbol
An IT staff member determines that slow communication with a company web server is caused by a computer on the internet sending a very large number of malformed web requests to the server. What type of attack is described in this scenario?
Phishing
Denial of Service (DoS)
Man-in-the-middle
Port scanning
Which Windows 10 tool is useful to determine which applications are using network services on a host?
Task Scheduler
Data Usage
Disk Cleanup
System Restore
Given a /48 Global Routing Prefix and a /64 prefix, what is the subnet portion of the IPv6 address 2001:db8:cafe:1111:2222:3333:4444:5555?
2001:db8
cafe
1111
2222
Which IPv4 address format was created for ease of use by people and is expressed as 201.192.1.14?
dotted decimal
dotted binary
hexadecimal notation
CIDR prefix length
What is an advantage of SMB over FTP?
SMB clients can establish a long‑term connection to the server
FTP always encrypts credentials and data by default
SMB only transfers files in active mode
FTP supports persistent file locks while SMB does not
The application layer of the TCP/IP model performs the functions of what three layers of the OSI model? (Choose three.)
application
presentation
session
transport
network
Which type of attack involves an adversary attempting to gather information about a network to identify vulnerabilities?
reconnaissance
access
denial‑of‑service
privilege escalation
