WorksheetsCCNA Final Exam: Questions 1-5
Total questions: 64
Worksheet time: 32mins
Which traffic type commonly uses the Real-Time Transport Protocol (RTP)?
Static web page downloads
Encrypted file backups overnight
Bulk peer-to-peer data sync
Video streams during conferencing
Which wireless technology is designed for low power and low data rate, making it suitable for home automation sensors?
ZigBee mesh for smart devices
5G cellular user equipment
Wi‑Fi high‑throughput access
LoRaWAN long‑range gateways
In the TCP/IP model, which layer is responsible for routing packets across interconnected networks?
Internet layer routing functions
Transport layer session control
Application layer service APIs
Network access physical signaling
Which server type stores records such as A, NS, AAAA, and MX to resolve hostnames?
DNS authoritative resolvers
Email relay gateways
File distribution servers
Web application front ends
Which statement best describes a proprietary protocol?
Defined and controlled by one organization
Freely implemented by any vendor
Always part of the TCP/IP open suite
Mandated by international standards bodies
What service is provided by DNS?
Uses encryption to secure web multimedia exchanges
Allows data transfers between a client and file server
A basic set of rules for exchanging multimedia files
Resolves domain names into IP addresses
A client packet is received by a server with destination port 110. What service is the client requesting?
SMTP
DHCP
POP3
DNS
What command can be used on a Windows PC to see the IP configuration of that computer?
show ip interface brief
ping
ipconfig
show interfaces
A wired laser printer is attached to a home computer and shared so other computers on the home network can use it. What networking model is in use?
peer-to-peer (P2P)
point-to-point
client-based
master-slave
What characteristic describes a virus?
An attack that slows or crashes a device or service
Malicious software or code running on an end device
The use of stolen credentials to access private data
A network device that filters traffic entering a network
Three employees use a corporate network for an audio conference, financial transactions, and browsing a web page. With QoS enabled, which priority order from highest to lowest is most appropriate for these data types?
web page, audio conference, financial transactions
audio conference, web page, financial transactions
financial transactions, audio conference, web page
audio conference, financial transactions, web page
Which IPv6 addressing component is assigned by the provider and identifies the general network portion?
subnet ID
interface ID
global routing prefix
subnet mask
In IPv6, which component is equivalent to the host portion in IPv4 and uniquely identifies an endpoint on a link?
global routing prefix
subnet ID
interface ID
subnet mask
During an end‑to‑end file transfer using FTP, which set of TCP/IP model layers is involved?
application and Internet layers only
application, Internet, and network access layers only
application, transport, Internet, and network access layers
application, session, transport, network, data link, and physical layers
A switch begins forwarding a frame as soon as it reads the destination MAC address. Which forwarding method is described?
fragment‑free switching
buffered switching
cut‑through switching
store‑and‑forward switching
Which characteristic is typical of store‑and‑forward switching?
has consistently lower latency than other methods
may forward runt frames due to early transmission
always stores the entire frame before forwarding
forwards immediately after destination is read
Which two checks are performed by a store‑and‑forward switch before forwarding a frame?
CRC and frame length checks
destination address and VLAN tag checks
TTL and header checksum checks
port duplex and speed checks
Which switching method can exhibit lower latency but risks transmitting corrupt or runt frames?
broadcast suppression method
cut‑through method
store‑and‑forward method
adaptive learning method
In the diagram, which router interface IP should be configured as host H1's default gateway?
R2 S0/0/0 interface address
R1 G0/0 interface address
R2 S0/0/1 interface address
R1 S0/0/0 interface address
Which service is the core function of Internet Messenger?
Remote administrative access to network devices
Encrypted tunnels for secure remote access
Real-time chatting among remote users
Resolving domain names to IP addresses
A host must send traffic off its local LAN. Which simple configuration enables this routing at the host?
Set a static ARP entry to the router
Configure the router's LAN interface as default gateway
Enable DHCP client on the switch port
Assign the ISP DNS server as default route
Network A requires about 100 usable host addresses. Which subnet mask best meets this need on a Class C network?
/25 giving 128 usable addresses
/28 giving 16 usable addresses
/26 giving 64 usable addresses
/27 giving 32 usable addresses
You must allocate subnets for four segments: A=100 hosts, B=50 hosts, C=25 hosts, D=2 hosts. Which first-fit allocation from a 192.168.0.0/24 pool is most efficient?
A: /30, B: /28, C: /27, D: /25
A: /26, B: /25, C: /27, D: /28
A: /25, B: /26, C: /27, D: /30
A: /27, B: /26, C: /25, D: /29
A network engineer mistakenly sets H1's default gateway to R1's serial interface. What is the likely outcome for H1's connectivity?
H1 reaches local LAN but cannot reach remote networks
H1 works normally due to router proxy ARP
H1 can reach remote networks but not DNS servers
H1 loses connectivity because gateway is off the LAN
Refer to the exhibit showing an ARP table output. Which protocol was responsible for building the table that is shown?
DHCP
ARP
DNS
ICMP
A network administrator observes corrupted, distorted signals on newly installed copper Ethernet cabling routed near fluorescent lights and electrical equipment. Which two factors are most likely causing interference with the cabling?
Crosstalk and signal attenuation
Extended length and crosstalk
Signal attenuation and extended length
RFI and EMI
A host must send a packet to a device on a remote LAN segment but has no entry for the destination in its ARP cache. How will the host obtain the destination MAC address?
Send the frame with a broadcast MAC address
Send an ARP request for the destination MAC
Send a request to DNS for the destination MAC
Send the frame using its own MAC as destination
On a Windows PC, which command directly displays the ARP cache entries similar to the table shown in the exhibit?
nslookup
arp -a
netstat -r
ipconfig /all
A client packet arrives with destination port 53. Which service is being requested?
IMAP
DNS
NetBIOS (NetBT)
POP3
A new LAN must support 25 hosts. What is the smallest subnet mask that meets this requirement?
255.255.255.128
255.255.255.240
255.255.255.224
255.255.255.192
Which description correctly characterizes a Trojan horse?
Malicious software or code on an end device
A network device that filters inbound traffic
An attack that slows or crashes a network service
Use of stolen credentials to access private data
What service is provided by HTTPS?
Encryption securing exchange of text, images, sound, video
Secure remote access to network devices and servers
Resolving domain names like cisco.com to IP addresses
Remote access to network devices without encryption
How does a PC track flows for multiple application sessions so each app receives the correct packets?
By the source port number used by each application
By the source IP address of the PC
By the destination IP address of the PC
By the destination MAC address of the PC
A new LAN must support 61 connected devices. Which subnet mask provides enough usable host addresses while being the smallest possible?
255.255.255.224
255.255.255.192
255.255.255.128
255.255.255.240
Which statement best describes a DoS attack?
Software that secretly collects user information
An attack that slows or crashes a network service
A filtering device controlling network traffic
Credential theft to access private data
You need a subnet that supports about 100 hosts with minimal waste. Which prefix length fits this requirement?
/27 providing 30 usable hosts
/25 providing 126 usable hosts
/24 providing 254 usable hosts
/26 providing 64 usable hosts
A point-to-point link between two routers needs 2 usable addresses. Which subnet is most appropriate?
192.168.0.0/24
192.168.0.128/26
192.168.0.192/27
192.168.0.224/30
Match each network with the correct IP address block to satisfy host needs shown in the diagram.
Network A → 192.168.0.0/25
Network B → 192.168.0.128/26
Network C → 192.168.0.192/27
Network D → 192.168.0.224/30
For a subnet supporting 50 hosts, what is the smallest mask that meets the requirement?
255.255.255.192 supporting 62 hosts
255.255.255.128 supporting 126 hosts
255.255.255.224 supporting 30 hosts
255.255.255.240 supporting 14 hosts
Match the application protocols to the correct transport protocols as shown. Which protocol uses TCP?
DHCP and TFTP use TCP
HTTP and TFTP use UDP
SMTP and DHCP use UDP
FTP, HTTP, SMTP use TCP
What service is provided by SMTP?
Allows remote access to network devices and servers
Uses encryption to provide secure remote access to network devices and servers
An application that allows real-time chatting among remote users
Allows clients to send email to a mail server and servers to send email to other servers
Which scenario describes a function provided by the transport layer?
VoIP phone uses its burned identifier as a transport layer address
Web-based movie sound is encoded within the transport layer header
Two browser windows open; transport layer delivers each page to the correct window
Transport layer formats the screen so pages render properly on any device
In the exhibit, Host B on subnet Teachers sends a packet to Host D on subnet Students. What Layer 2 destination and source addresses are in the frame leaving Host B toward the router?
Dest 00-00-0c-94-36-ab; Src 00-00-0c-94-36-aa
Dest 00-00-0c-94-36-dd; Src 00-00-0c-94-36-bb
Dest 00-00-0c-94-36-ab; Src 00-00-0c-94-36-bb
Dest 00-00-0c-94-36-cd; Src 00-00-0c-94-36-bb
In the same exhibit, what Layer 3 destination and source IP addresses are in the packet leaving Host B toward the router?
Dest 172.16.20.200; Src 172.16.10.200
Dest 172.16.20.99; Src 172.16.10.200
Dest 172.16.20.200; Src 172.16.10.100
Dest 172.16.20.99; Src 172.16.10.100
What does the term attenuation mean in data communication?
Time for a signal to reach its destination
Loss of signal strength as distance increases
Leakage of signals from one cable pair to another
Strengthening of a signal by a networking device
Which application protocol commonly relies on UDP rather than TCP?
HTTP uses UDP for web pages
SMTP uses UDP for email relay
TFTP uses UDP for lightweight file transfer
FTP uses UDP for quicker transfers
Which transport-layer concept best explains delivering two web pages to their correct browser windows?
ARP resolves window identifiers
MAC addresses distinguish browser tabs
DHCP assigns unique socket IDs
Port numbers identify application endpoints
When Host B sends to Host D across subnets, which device’s MAC becomes the Layer 2 destination on the first hop?
Router interface Fa0 MAC
Host C NIC MAC
Host D NIC MAC
Switch uplink MAC
Refer to the exhibit. An administrator is trying to configure the switch but receives the error message that is displayed in the exhibit. What is the problem?
The entire command, configure terminal, must be used.
The administrator is already in global configuration mode.
The administrator must first enter privileged EXEC mode before issuing the command.
The administrator must connect via the console port to access global configuration mode.
Which two protocols operate at the top layer of the TCP/IP protocol suite? (Choose two.)
POP
DNS
A company has a file server that shares a folder named Public. The network security policy specifies that the Public folder is assigned Read-Only rights to anyone who can log into the server while the Edit rights are assigned only to the network admin group. Which component is addressed in the AAA network service framework?
authorization
authentication
What three requirements are defined by the protocols used in network communications to allow message transmission across a network? (Choose three.)
message encoding
media selection
message size
What are two characteristics of IP? (Choose two.)
does not require a dedicated end-to-end connection
operates independently of the network media
Which network characteristic ensures prioritized video traffic so meeting quality remains excellent during a call?
Scalability for future user growth
Quality of service for prioritized traffic
Integrity of stored configuration files
Security using strong authentication
Which cause most commonly degrades signals on UTP cabling during installation work?
Low-quality shielding in copper
Improper termination of twisted pairs
Loss of light across long links
Installing cables inside conduit
You need a subnet that contains host address 192.168.1.96. Which subnet range is correct?
192.168.1.64/29 includes .65–.70
192.168.1.32/28 includes .33–.46
192.168.1.32/27 includes .33–.62
192.168.1.64/26 includes .65–.126
Refer to the exhibit. Based on the tracert output shown, which two statements about network connectivity are correct? (Choose two.)
The host lacks a configured default gateway
There are 4 hops to reach 192.168.100.1
There is successful connectivity to 192.168.100.1
The path supports high-quality videoconferencing
Average round-trip time is 2 milliseconds
Which two actions best assess traffic flow patterns and network traffic types using a protocol analyzer? (Choose two.)
Capture traffic on weekends when usage is low
Capture during peak utilization to reflect typical types
Only capture near the data center aggregation switches
Perform captures on different network segments
Only capture WAN web traffic because it dominates volume
What is the consequence of configuring a router with the ipv6 unicast-routing global configuration command?
Each interface creates an IPv6 link-local address
A global unicast address is statically added
Interfaces start sending ICMPv6 Router Advertisements
All router interfaces automatically activate
Which three OSI layers map to the Application layer of the TCP/IP model? (Choose three.)
Application, Transport, Internet
Session, Transport, Network
Application, Presentation, Session
Presentation, Data Link, Physical
Network, Data Link, Physical
Refer to the exhibit. PC1 sends a packet to PC2 and routing is configured between R1 and R2. What will R1 do with the Ethernet frame header attached by PC1?
Open the header to decide if it exits interface S0/0/0
Do nothing, because a route exists to the destination
Remove the Ethernet header and build a new Layer 2 header
Open and replace only the destination MAC address
A host has an incorrect default gateway configured. What is the most likely impact on its connectivity?
Cannot communicate with local subnet hosts
Loopback ping to 127.0.0.1 will fail
Cannot communicate with hosts in other networks
Switch will not forward packets from this host
Which statement correctly describes an ARP behavior on IPv4 networks?
Frames are encapsulated using ARP tables only
Device sends ARP reply when it needs a MAC
Host with IP but no MAC sends ARP broadcast
ARP request always targets a single known MAC
A new LAN must support 90 usable hosts. Which subnet mask provides the smallest network that meets this requirement?
255.255.255.128 supports at least 126 hosts
255.255.255.240 supports about 14 hosts
255.255.255.224 supports about 30 hosts
255.255.255.248 supports about 6 hosts
