WorksheetsUntitled Quiz
Total questions: 83
Worksheet time: 42mins
Which network service automatically assigns IP addresses to devices on the network?
NTP server synchronizing clocks
DNS server with static zones
DHCP server using leases
ARP service resolving MACs
What are NOT benefits of using a layered network model? (Choose three.)
Eliminates the need for protocols entirely
Encourages standard interfaces across layers
Prevents interoperability between vendors
Simplifies troubleshooting complex networks
What are NOT the goals and benefits of protocols in data communications? (Choose three.)
Define error handling and recovery
Increase ambiguity of message formats
Enable reliable data exchange
Introduce inconsistent addressing schemes
Which logical addresses are NOT changed in the process of delivery of data to a remote network (NAT is not used)? Please select all applicable options.
Source MAC address remains unchanged
Destination MAC address remains unchanged
Destination IP address remains unchanged
Source IP address remains unchanged
Please mark below all incorrect statements. (Choose three.)
Routers operate at OSI Layer 3
Switches always modify IP headers
TCP provides connection-oriented transport
UDP offers best-effort delivery
Which type of communication are NOT sending a message to a group of host destinations simultaneously? (Choose two.)
Broadcast to all devices
Anycast to nearest instance
Multicast to subscribed group
Unicast to a single host
What requirements are defined by the protocols used in network communications to allow message transmission across a network? (Choose three.)
Message encoding and formatting
Error detection and recovery
Cable colors and rack layout
Addressing and routing rules
What are two functions of end devices on a network? (Choose two.)
Forward frames across segments
Originate and consume data
Apply network policies centrally
Route packets between LANs
What is the primary benefit of a peer-to-peer network for small environments?
Centralized authentication services
Low cost with simple sharing
Guaranteed enterprise scalability
Built-in fault-tolerant routing
Please select below the most proper statement about the data transportation speed.
Bandwidth indicates capacity not latency
Speed equals application throughput always
Latency defines frames per second only
Throughput ignores protocol overheads
Please find below the organization which defines standards for the first TCP/IP layer.
ICANN assigns MAC addresses
IEEE defines physical media
ISO manages file formats
IETF sets cabling pinouts
Which TCP/IP model layer combines the OSI Data Link and Physical layers?
Transport layer
Network Access layer
Internet layer
Application layer
What layer of the TCP/IP protocol model determines the best path through the network?
Application layer
Transport layer
Internet layer
Network Access layer
Which function is provided by the Presentation layer of the OSI model?
Reliable end-to-end delivery
Path selection and routing
Data encryption and translation
Session establishment control
What is the primary purpose of decapsulation in networking?
Add headers for transmission
Translate addresses across VLANs
Encrypt payloads before routing
Remove headers at each layer
Which OSI layer provides reliable end-to-end delivery using acknowledgements and retransmissions?
Transport layer
Network layer
Data Link layer
Physical layer
What is another name for the OSI transport layer?
Session layer
Host-to-host layer
Presentation layer
Network layer
Which term describes data at the OSI Network layer?
Frames
Segments
Packets
Bits
What is the name of PDU at the forth layer of OSI model?
Frame
Bit
Packet
Segment
A web client is sending a request for a webpage to a web server. From the perspective of the client, what is the correct order of the protocol stack that is used to prepare the request for transmission?
Transport, Network Access, Internet, Application
Internet, Application, Transport, Network Access
Network Access, Internet, Transport, Application
Application, Transport, Internet, Network Access
What type of intermediate devices analyses data link layer addresses? (Choose two.)
Firewall and router
Hub and modem
Bridge and switch
Router and bridge
Why do we need a loopback interface test? Select the best statement.
To check WAN link errors
To test remote routing paths
To verify local TCP/IP stack
To measure wireless throughput
Please provide the definition of a socket.
Physical interface on NIC
Process scheduling handle
Logical port plus IP address
Encrypted tunnel endpoint
The user wants to see the active connections of his PC. Please select below the command he should use.
netstat -ano
nslookup -type=any
ipconfig /all
arp -a
The technician activated the network security authentication function. Please select below the goal of this action.
Encrypt stored files
Block outbound emails
Inspect traffic patterns
Verify user identity
What is the role of an IDS?
Prevent malware execution
Detect malicious activity
Authorize user accounts
Encrypt network sessions
What is the objective of a network reconnaissance attack?
Jam wireless signals
Destroy critical data
Discover system information
Exploit buffer overflows
Which device is used by other network devices to authenticate and authorize management access?
Wireless controller
AAA server
Content filter
Load balancer
Which services are provided by the AAA framework? (Choose three.)
Authentication, Authorization, Accounting
Accounting, Auditing, Alerts
Access, Agreement, Assurance
Assessment, Approval, Accounting
The technician activated the network security accounting function. Please select below the goal of this action.
Log user activities
Grant admin rights
Encrypt TLS traffic
Reset passwords
Which attack involves a compromise of data that occurs between two end points?
Man-in-the-middle
Watering hole
Password spraying
SQL injection
Please find below the best solution for endpoint security.
Host firewall and EDR
BGP prefix filtering
DHCP snooping and ARP inspection
VLAN hopping prevention
Please find below the best description of the vulnerability term.
An exploitable weakness
A detected intrusion
A deliberate threat
A backup strategy
What type of attack may involve the use of tools such as nslookup and ping?
Ransomware distribution
Reconnaissance scanning
Privilege escalation
Session hijacking
What kind of threat is described when a threat actor impersonates another person to obtain credit information about that person?
Phishing
Dumpster diving
Identity theft
Tailgating
The network technician found out that the client database of a company was copied and sent to outside e-mail. How is this action described from the security stand point?
Data exfiltration
Backup replication
Privilege abuse
Internal segmentation
The hackers cracked a company web server and legal users could not access marketing information. What security impact best describes this action?
Authentication bypass of user logins
Availability attack denying service
Integrity breach of stored files
Confidentiality loss for private data
A security specialist detected that the content of an important file was changed. What was the attacker’s primary goal?
Expose confidential records
Reduce system availability
Evade user authentication
Compromise data integrity
George ran a simple FTP server with the weak password "file." His workstation was compromised and used to upload documents online. What type of attack best fits this scenario?
Malware exploiting zero-day bug
Dictionary attack against weak credentials
Elevation of local privileges
Brute-force password guessing
In summer the office router stopped working due to an AC unit problem. Which statement best classifies this threat?
External cyber attack event
Intentional insider sabotage
Environmental hazard causing outage
Network misconfiguration error
A malicious visitor disconnected the printer from its computer and nobody can print. What type of attack is this?
Firmware corruption of device
Wireless jamming interference
Physical disruption of service
Credential theft for printing
Which security concern is common with BYOD policies?
Loss of device and corporate data
Strong control of patch updates
Reduced need for access policies
Guaranteed endpoint standardization
Which two forms of software programs or processes provide access to the network? Choose two.
AAA authentication daemon
VPN client application
Routing protocol service
Remote desktop agent
Which two protocols are used to establish a remote access network connection to a device? Choose two.
SSH secure shell protocol
SNMP management protocol
Telnet remote terminal
FTP file transfer protocol
An employee needs secure remote access to a company network. Which network feature enables this in the safest way?
Port forwarding to office PC
VPN with encryption tunnels
Open Telnet over internet
Public guest Wi‑Fi bridge
Which term refers to a network that provides secure access to corporate offices by suppliers, customers, and collaborators?
DMZ screened subnet
WAN carrier service
Intranet private network
Extranet partner network
A technician was in interface configuration mode and entered the command no shutdown. What is the result of this action?
Starts routing daemon globally
Enables the interface administratively
Disables the interface state
Resets the device to default
The technician configured VTY lines with password for remote access. Which command should also be used to hide these passwords in the configuration file?
enable algorithm md5
username secret enable
ip ssh version two
service password-encryption
What is the best description of the difference between enable password and enable secret on Cisco IOS?
Secret applies to vty lines only
Password uses stronger hash
Secret is hashed; password is plaintext
Both store cleartext passwords
Technician is configuring the interface of the switch but he wants to see the rest of configuration without leaving a configuration mode. Which command does he need to use to see the current running configuration?
print current startup file
view active configuration lines
display running settings now
show run from config mode
Which statements are NOT true about copy running-config startup-config?
It erases NVRAM contents fully
It saves RAM config to NVRAM
It triggers router reload immediately
It backs up active configuration
After reload the router entered setup mode. Please select below the most probable reason of this action.
Incorrect interface speed
Bad console cable used
Corrupt IOS image in flash
No startup-config in NVRAM
Which memory location on a Cisco router or switch stores the running configuration file?
ROM stores running-config
NVRAM stores running-config
RAM stores running-config
Flash stores running-config
Which important procedure requires a technician enter the command copy startup-config running-config?
Loading IOS from flash
Restoring saved config to RAM
Saving RAM config to NVRAM
Backing up to external TFTP
Which statement is true about the running configuration file in a Cisco IOS device?
It resides in RAM and is editable
It resides in ROM and immutable
It resides in flash permanently
It resides in NVRAM encrypted
Which command can be used to save the running configuration to the startup configuration? (Choose two)
commit running to boot
write memory command
copy run start command
save active config now
Technician wants to cleanup the startup-configuration of the switch. Which command does he need to run?
clear running-config
delete flash config
reset nvram contents
erase startup-config
The technician wants to delete an incorrectly configured ip address on a router port. What command does he need?
remove address now
no ip address interface
delete ip from port
unset layer3 on port
A router with a valid operating system does not contain a configuration file stored in NVRAM. When the router boots up, which mode will display?
Setup dialog mode
ROMMON prompt
Privileged EXEC
User EXEC only
Which type of access should be secured on a Cisco router or switch with the enable secret password? (Choose all applicable)
Privileged EXEC access
Console user access
VTY remote access
ROMMON recovery access
Which passwords are NOT used to protect access to privileged EXEC mode? (Choose three.)
enable secret password
aux line password
vty line password
console line password
Please select below the commands which set up secure access to a router through a connection to the console interface. (Choose three)
transport input ssh only
login local command
password command set
line console 0 command
Being in privileged mode the technician entered the following commands: cont t, line vty 0 4, transport input ssh. Please select below the statement which describes the result of this action.
HTTP access configured
VTY lines accept SSH only
Console lines accept SSH
Telnet enabled on VTY
Technician issued “service password-encryption” command. What was the result of his action?
Enable SSH key exchange
Protect enable secret only
Disable Telnet globally
Encrypt plain text passwords
Please select below the best statement which uniquely describes the SSH connection.
Encrypted management protocol
Legacy clear-text protocol
Layer2 control protocol
Unreliable transport service
Which command should be used on a Cisco router or switch to allow log messages to be displayed on remotely connected sessions using Telnet or SSH?
debug all command
service password-encryption
show logging command
terminal monitor command
logging buffered command
Where are Cisco IOS debug output messages sent by default?
Syslog external server
Logging buffer memory
VTY remote session
Console line interface
AUX modem port
What is the function of the shell in an OS?
Kernel hardware control
Interface to run commands
Network stack routing role
File system storage layer
Graphical window manager
A technician is using the debug ip icmp privileged EXEC command to capture live router output. Which commands would stop this debug command on a Cisco router? (Choose two.)
show processes and stop debug
terminal no monitor and exit
undebug all and no debug all
clear counters and disable debug
no logging console and reload
Which command should a network engineer use to find the IP address information, host name, and IOS version of neighboring network devices?
show cdp neighbors detail
show lldp neighbors brief
show ip interface brief
show arp cache
show version output
A ping fails when performed from router R1 to directly connected router R2. The network administrator then issues the show cdp neighbors command. Why would the administrator issue this command if the ping failed between the two routers?
Test DNS resolution issues
Confirm default gateway settings
Inspect access control lists
Check routing table entries
Verify Layer 2 adjacency details
What information about a Cisco router can be verified using the show version command?
IOS version and uptime
CDP neighbor details
Interface counters only
ACL rule summaries
Routing protocol status
Which functions are NOT provided to users by the context-sensitive help feature of the Cisco IOS CLI? (Choose three).
Configuration wizards automation
Command syntax verification
Performance monitoring graphs
Security policy audit reports
Available command listings
Which software installed on key hosts can reveal the types of network traffic flowing through the network?
Compression archiver app
Antivirus signature tool
Backup client agent
Text editor utility
Protocol analyzer software
What are NOT functions of NVRAM? (Choose three).
Boot loader persistence
Volatile runtime memory
Temporary packet buffering
Startup configuration storage
CPU cache management
By following a structured troubleshooting approach, a network administrator identified a network issue after a conversation with the user. What is the next step that the administrator should take?
Gather more detailed evidence
Escalate to senior management
Purge configuration files
Deploy a network redesign
Close the incident ticket
A network engineer is analyzing reports from a recently performed network baseline. Which situation would depict a possible latency issue?
High RTTs and jitter spikes
Low CPU utilization overall
Stable throughput readings
Consistent packet sizes
Frequent ARP resolution
Which command displays system log messages on the terminal for a remote session?
terminal monitor output
debug ip packet log
logging console only
monitor session enable
show logging buffer
A technician has concluded that a network switch should be replaced. What is the next step before proceeding?
Document findings and obtain change approval
Order parts and replace the switch immediately
Notify users and perform an unplanned outage
Escalate to executive leadership for sign-off
Which requirement enables classifying network traffic according to priority for QoS?
Client-side traffic shaping software
Encrypted tunnels for all applications
Defined traffic classes and marking policy
A larger switch backplane capacity
Which term describes employees using personal devices to access company resources?
BYOD
SSO
MAM
NAC
How does BYOD change the way businesses implement networks?
Requires robust security and access controls
Eliminates need for corporate Wi‑Fi networks
Forces all users to adopt one device model
Removes compliance and auditing obligations
Which acronyms represent standards organizations? Choose three.
TLS, WPA, SSH
DMZ, NAT, QoS
LAN, WAN, MAN
IEEE, ISO, IETF
