Network Devices and Diagrams, OSI & TCP/IP Models, Cables and Media Flashcards by vadim craevschi

Which device forwards packets based on IP addresses?
A. Switch
B. Router
C. Hub
D. Bridge

✅ Answer: B

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Which of the following operates at Layer 2 of the OSI model?
A. Router
B. Switch
C. Repeater
D. Firewall

✅ Answer: B

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Which device is used to regenerate signals in a network?
A. Hub
B. Bridge
C. Repeater
D. Router

✅ Answer: C

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Which device can reduce collisions and separate collision domains?
A. Hub
B. Switch
C. Repeater
D. Firewall

✅ Answer: B

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Which device works by broadcasting traffic to all ports?
A. Switch
B. Router
C. Hub
D. Firewall

✅ Answer: C

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Which two devices can break up broadcast domains?
A. Switch and Bridge
B. Hub and Switch
C. Router and Layer 3 Switch
D. Repeater and Router

✅ Answer: C

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Which device connects two different network types and filters traffic by MAC address?
A. Router
B. Switch
C. Bridge
D. Hub

✅ Answer: C

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What type of device is commonly used to interconnect multiple devices in a LAN?
A. Router
B. Switch
C. Bridge
D. Repeater

✅ Answer: B

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Which device can perform NAT and DHCP functions?
A. Hub
B. Repeater
C. Router
D. Switch

✅ Answer: C

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Which device filters packets based on IP address and port number?
A. Bridge
B. Router
C. Firewall
D. Switch

✅ Answer: C

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What does a switch use to forward frames?
A. IP address
B. Port number
C. MAC address
D. Subnet mask

✅ Answer: C

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Which device can interconnect networks using different protocols?
A. Hub
B. Repeater
C. Router
D. Switch

✅ Answer: C

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Which of the following creates a broadcast domain by default?
A. Hub
B. Switch
C. Router
D. Bridge

✅ Answer: B

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Which device separates collision domains but not broadcast domains?
A. Router
B. Switch
C. Hub
D. Firewall

✅ Answer: B

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Which device does NOT filter or inspect traffic?
A. Hub
B. Router
C. Switch
D. Firewall

✅ Answer: A

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What is the default behavior of a hub?
A. Sends data only to the destination
B. Inspects and filters packets
C. Forwards data to all connected devices
D. Uses IP addresses for routing

✅ Answer: C

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Which of these is a Layer 3 device?
A. Switch
B. Hub
C. Router
D. Repeater

✅ Answer: C

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Which of the following stores MAC addresses in a table?
A. Router
B. Switch
C. Bridge
D. Hub

✅ Answer: B

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A Layer 2 switch uses which of the following to make forwarding decisions?
A. IP address
B. MAC address
C. Port number
D. VLAN ID

✅ Answer: B

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Which device learns MAC addresses dynamically?
A. Repeater
B. Hub
C. Switch
D. Firewall

✅ Answer: C

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Which of these network devices segments a network into separate collision domains?
A. Repeater
B. Switch
C. Hub
D. Bridge

✅ Answer: B

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What kind of device is best for connecting networks with different architectures (e.g., Ethernet to Token Ring)?
A. Router
B. Bridge
C. Gateway
D. Hub

✅ Answer: C

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Which device creates the most LAN segments?
A. Hub
B. Switch
C. Router
D. Repeater

✅ Answer: C

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What is a common use of a bridge in modern networks?
A. Connecting two network layers
B. Segmenting a network
C. Interconnecting VLANs
D. Assigning IP addresses

✅ Answer: B

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Which device can route traffic between VLANs? A. Layer 2 switch B. Hub C. Layer 3 switch D. Bridge

✅ Answer: C

What does a router consult to make forwarding decisions? A. MAC table B. VLAN ID C. Routing table D. ARP cache

✅ Answer: C

Which of the following cannot segment a network? A. Bridge B. Switch C. Hub D. Router

✅ Answer: C

What does NAT stand for? A. Network Address Translation B. Network Access Table C. Net Address Terminal D. None of the above

✅ Answer: A

Which device would be most effective in reducing network congestion? A. Hub B. Switch C. Bridge D. Repeater

✅ Answer: B

What does a firewall typically use to control traffic? A. MAC addresses B. IP addresses and port numbers C. VLAN IDs D. Subnet masks

✅ Answer: B

How many layers are in the OSI model? A. 4 B. 5 C. 6 D. 7

✅ Answer: D

Which layer of the OSI model is responsible for routing? A. Data Link B. Transport C. Network D. Physical

✅ Answer: C

In the TCP/IP model, what corresponds to the OSI Transport layer? A. Internet B. Host-to-Host C. Network Interface D. Application

✅ Answer: B

Which OSI layer handles error detection and correction? A. Physical B. Network C. Data Link D. Transport

✅ Answer: C

Which OSI layer provides encryption and compression? A. Session B. Presentation C. Application D. Transport

✅ Answer: B

Which OSI layer is responsible for end-to-end communication and reliability? A. Transport B. Network C. Data Link D. Application

✅ Answer: A

Which of the following protocols operates at the Transport layer? A. IP B. TCP C. ARP D. ICMP

✅ Answer: B

Which protocol is connection-oriented? A. UDP B. ICMP C. TCP D. IP

✅ Answer: C

Which protocol uses ports to identify applications? A. IP B. ICMP C. TCP D. DNS

✅ Answer: C

What is the function of the Session layer? A. Encrypts data B. Maintains dialogs C. Routes packets D. Handles physical transmission

✅ Answer: B

Which layer of the OSI model is responsible for logical addressing? A. Transport B. Network C. Data Link D. Application

✅ Answer: B

What layer in the OSI model does a switch operate at (by default)? A. Network B. Data Link C. Transport D. Application

✅ Answer: B

At which OSI layer would you find MAC addresses? A. Network B. Data Link C. Transport D. Physical

✅ Answer: B

Which layer converts data into electrical signals? A. Physical B. Transport C. Network D. Data Link

✅ Answer: A

Which OSI layer uses IP addresses? A. Network B. Transport C. Application D. Data Link

✅ Answer: A

The TCP/IP model consists of how many layers? A. 4 B. 5 C. 6 D. 7

✅ Answer: A

Which layer of TCP/IP handles error recovery and flow control? A. Application B. Internet C. Transport D. Network Access

✅ Answer: C

What layer of the OSI model is responsible for file formats and character encoding? A. Session B. Application C. Presentation D. Network

✅ Answer: C

Which layer is responsible for DNS and HTTP? A. Session B. Transport C. Application D. Network

✅ Answer: C

Which layer adds headers and trailers to data? A. Application B. Physical C. Data Link D. Presentation

✅ Answer: C

What is segmentation in the OSI model? A. Combining packets B. Splitting data into smaller parts C. Encrypting data D. Filtering packets

✅ Answer: B

Which layer ensures the complete delivery of data? A. Network B. Transport C. Data Link D. Application

✅ Answer: B

Which TCP/IP layer includes Ethernet and ARP? A. Internet B. Transport C. Application D. Network Access

✅ Answer: D

In the OSI model, data is called a "segment" at which layer? A. Network B. Data Link C. Transport D. Physical

✅ Answer: C

What is the PDU (Protocol Data Unit) at the Network layer? A. Segment B. Packet C. Frame D. Bit

✅ Answer: B

Which layer is responsible for framing? A. Network B. Data Link C. Physical D. Transport

✅ Answer: B

In the OSI model, what is the PDU at the Data Link layer? A. Packet B. Segment C. Frame D. Bit

✅ Answer: C

Which of these operates at Layer 3 of the OSI model? A. Switch B. Router C. Repeater D. Bridge

✅ Answer: B

The Transport layer is responsible for which of the following? A. IP addressing B. Port numbers C. Framing D. MAC addressing

✅ Answer: B

Which OSI layer controls dialog establishment and termination? A. Application B. Session C. Presentation D. Transport

✅ Answer: B

Which layer of the OSI model includes the "ping" command functionality? A. Application B. Network C. Transport D. Physical

✅ Answer: B

Which protocol resolves IP addresses to MAC addresses? A. DNS B. TCP C. ARP D. ICMP

✅ Answer: C

Which of the following layers is responsible for multiplexing? A. Network B. Transport C. Data Link D. Application

✅ Answer: B

Which layer ensures path determination and logical addressing? A. Network B. Transport C. Session D. Presentation

✅ Answer: A

Which of the following is a Layer 7 protocol? A. TCP B. IP C. HTTP D. ICMP

✅ Answer: C

Which of the following is a Layer 4 protocol? A. HTTP B. TCP C. ARP D. FTP

✅ Answer: B

Which OSI layer is most concerned with the transmission medium? A. Data Link B. Network C. Session D. Physical

✅ Answer: D

Which of the following operates at both Layer 2 and Layer 3 (in some configurations)? A. Repeater B. Hub C. Layer 3 Switch D. Firewall

✅ Answer: C

Which protocol in the Internet layer is responsible for best-effort delivery? A. ICMP B. IP C. TCP D. DNS

✅ Answer: B

What does the Application layer of the OSI model provide? A. Routing B. User interface C. Signal encoding D. Logical addressing

✅ Answer: B

Which cable type is used to connect two switches directly? A. Straight-through B. Crossover C. Rollover D. Console

✅ Answer: B

Which cable is typically used to connect a PC to a switch? A. Crossover B. Fiber C. Straight-through D. Rollover

✅ Answer: C

What type of cable is used to connect to a router's console port? A. Straight-through B. Fiber C. Rollover D. Coaxial

✅ Answer: C

Which of the following is a characteristic of fiber-optic cable? A. Uses electrical signals B. More susceptible to EMI C. Transmits data using light D. Limited to short distances

✅ Answer: C

Which connector is used with twisted pair copper cabling? A. LC B. SC C. RJ-45 D. BNC

✅ Answer: C

What type of connector is commonly used with fiber cables? A. RJ-45 B. LC C. USB D. DB-9

✅ Answer: B

Which cable type offers the highest resistance to electromagnetic interference (EMI)? A. Coaxial B. UTP C. Fiber-optic D. STP

✅ Answer: C

Which of the following media types is most likely to experience crosstalk? A. Fiber B. Coaxial C. UTP D. Wireless

✅ Answer: C

What is the maximum recommended distance for CAT5e Ethernet cable? A. 50 meters B. 100 meters C. 300 meters D. 500 meters

✅ Answer: B

What does UTP stand for? A. Universal Transfer Protocol B. Unshielded Twisted Pair C. Uniform Twisted Protocol D. Unidirectional Transmission Path

✅ Answer: B

Which medium uses radio frequency to transmit data? A. Coaxial B. Fiber C. Wireless D. Twisted pair

✅ Answer: C

Which of the following is a benefit of using fiber over copper? A. Lower cost B. Shorter distance support C. Immunity to EMI D. Simpler installation

✅ Answer: C

Which of the following is a shielded cable type? A. UTP B. STP C. Fiber D. Coaxial

✅ Answer: B

What is the primary use for a crossover Ethernet cable? A. Connecting a PC to a switch B. Connecting a router to a firewall C. Connecting similar devices D. Connecting to the Internet

✅ Answer: C

Which connector is used in serial console connections? A. RJ-45 B. LC C. DB-9 D. BNC

✅ Answer: C

Which cable is used for a direct serial connection to a Cisco router? A. USB B. Rollover C. HDMI D. Ethernet

✅ Answer: B

What is the purpose of a T568A or T568B wiring standard? A. Device addressing B. Console connection C. Ethernet cable pinout D. IP routing

✅ Answer: C

What is the typical speed supported by CAT6 cable? A. 100 Mbps B. 1 Gbps C. 10 Gbps D. 100 Gbps

✅ Answer: C

Which of these is NOT a copper media type? A. UTP B. STP C. Coaxial D. Fiber

✅ Answer: D

What is a benefit of STP over UTP? A. Cost B. Easier installation C. EMI protection D. Greater length support

✅ Answer: C

Which of the following is a multimode fiber characteristic? A. Longer distances B. Single light path C. Multiple light paths D. Slower than copper

✅ Answer: C

Which of these is used for long-haul backbone cabling? A. CAT5 B. STP C. Fiber-optic D. UTP

✅ Answer: C

Which layer of the OSI model includes the transmission medium? A. Physical B. Network C. Data Link D. Application

✅ Answer: A

What does EMI stand for? A. Enhanced Media Interface B. Electromagnetic Interference C. Ethernet Management Interface D. Electronic Media Index

✅ Answer: B

Which connector is common on coaxial cables? A. RJ-45 B. SC C. LC D. BNC

✅ Answer: D

Which Ethernet cable standard supports speeds up to 1 Gbps? A. CAT5 B. CAT5e C. CAT3 D. CAT2

✅ Answer: B

Which media type is immune to lightning strikes and electrical surges? A. Coaxial B. STP C. Fiber D. UTP

✅ Answer: C

Which cable has four twisted pairs but no shielding? A. STP B. UTP C. Fiber D. Coaxial

✅ Answer: B

Which of the following is NOT used in fiber optic systems? A. LC B. SC C. RJ-45 D. ST

✅ Answer: C

Which of these is typically used to connect end-user devices to a switch? A. Crossover B. Straight-through C. Rollover D. Fiber patch

✅ Answer: B

Which fiber connector uses a push-pull mechanism? A. ST B. SC C. RJ-45 D. BNC

✅ Answer: B

Which connector uses a twist-on method for coaxial? A. RJ-45 B. BNC C. LC D. SC

✅ Answer: B

What’s a common use for coaxial cable today? A. Server connections B. Backbone links C. Cable TV D. Fiber connections

✅ Answer: C

Which Ethernet standard supports 10 Gbps over twisted pair? A. 10BASE-T B. 100BASE-T C. 1000BASE-T D. 10GBASE-T

✅ Answer: D

Which of the following is the most flexible cable type for LANs? A. UTP B. Fiber C. Coaxial D. STP

✅ Answer: A

What is the transmission speed of 100BASE-T Ethernet? A. 10 Mbps B. 100 Mbps C. 1 Gbps D. 10 Gbps

✅ Answer: B

Which type of fiber is better for long distances? A. Multimode B. Single-mode C. Coaxial D. STP

✅ Answer: B

What is the maximum speed of CAT5e cable? A. 10 Mbps B. 100 Mbps C. 1 Gbps D. 10 Gbps

✅ Answer: C

What is the purpose of a patch panel? A. To provide routing functions B. To connect firewalls C. To manage and organize cables D. To amplify network signals

✅ Answer: C

What cable should be used to connect a PC directly to another PC? A. Straight-through B. Rollover C. Crossover D. Fiber

✅ Answer: C

Which port is used for initial configuration of a Cisco router? A. Ethernet B. USB C. Console D. AUX

✅ Answer: C

Which of the following commands enters privileged EXEC mode in Cisco IOS? A. enable B. configure terminal C. exec D. privileged

✅ Answer: A

Which command is used to enter global configuration mode? A. setup B. enable C. configure terminal D. config

✅ Answer: C

What is the default baud rate for console access on a Cisco device? A. 2400 B. 4800 C. 9600 D. 19200

✅ Answer: C

Which software is commonly used to access the router console? A. Notepad B. Wireshark C. PuTTY D. Chrome

✅ Answer: C

Which of the following connects directly to a router's console port? A. USB cable B. Rollover cable C. Ethernet cable D. Fiber patch

✅ Answer: B

Which interface type is typically used for in-band management? A. Console B. AUX C. Ethernet D. USB

✅ Answer: C

What does the AUX port on a Cisco router typically support? A. USB access B. Local console C. Remote modem access D. Ethernet connectivity

✅ Answer: C

Which prompt indicates you are in global configuration mode? A. Router> B. Router# C. Router(config)# D. Router(config-if)#

✅ Answer: C

What command is used to set the hostname of a router? A. hostname B. setname C. conf name D. name

✅ Answer: A

Which command saves the current configuration to NVRAM? A. write run B. copy run start C. copy flash tftp D. save

✅ Answer: B

Which command displays the current running configuration? A. show config B. show startup-config C. show running-config D. display config

✅ Answer: C

Which cable is required to connect a PC to the router console port? A. Straight-through B. Crossover C. Rollover D. Fiber

✅ Answer: C

What command shows interface status and IPs? A. show interface B. show ip interface brief C. show interfaces D. show interface detail

✅ Answer: B

How do you enter interface configuration mode for FastEthernet0/0? A. int FastEthernet 0/0 B. interface FastEthernet0/0 C. configure FastEthernet0/0 D. set FastEthernet0/0

✅ Answer: B

What key combination breaks out of a stuck terminal session in PuTTY? A. Ctrl+Shift+X B. Ctrl+C C. Ctrl+Break D. Esc+Q

✅ Answer: C

What is stored in the NVRAM of a router? A. Running config B. IOS image C. Startup config D. Boot loader

✅ Answer: C

What is the command to set an IP address on an interface? A. set ip address B. ip set address C. ip address D. assign ip

✅ Answer: C

What prompt appears after a successful login but before typing enable? A. Router# B. Router> C. Router(config)# D. Router(config-if)#

✅ Answer: B

Which protocol is used for remote CLI access? A. HTTP B. FTP C. Telnet D. SMTP

✅ Answer: C

Which protocol is more secure than Telnet? A. FTP B. SSH C. SNMP D. SMTP

✅ Answer: B

Which command enables a password for Telnet access? A. line vty 0 4 B. enable secret C. password console D. telnet password

✅ Answer: A

Which mode are you in when the prompt is Router(config-if)#? A. Global config B. Interface config C. Privileged exec D. User exec

✅ Answer: B

How do you prevent unauthorized access to the console? A. Use an access list B. Set a console password C. Disable console port D. Use SSH

✅ Answer: B

Which command shows the version of IOS? A. version B. show ios C. show version D. ios version

✅ Answer: C

Which memory type holds the IOS image? A. RAM B. NVRAM C. ROM D. Flash

✅ Answer: D

What does write memory do? A. Writes to RAM B. Erases config C. Saves running config to startup config D. Loads the IOS

✅ Answer: C

Which password is encrypted by default? A. Console B. VTY C. Enable secret D. Enable password

✅ Answer: C

Which is required for SSH access? A. Login command B. IP address C. Hostname and domain name D. Password

✅ Answer: C

Which command generates a key for SSH? A. ssh generate B. ip ssh key C. crypto key generate rsa D. enable ssh

✅ Answer: C

Which command restricts Telnet to SSH only? A. no telnet B. transport input ssh C. deny telnet D. access-list block telnet

✅ Answer: B

Which command shows the IP address of interfaces? A. show ip B. show interface ip C. show ip interface brief D. show config

✅ Answer: C

Which port does SSH use by default? A. 21 B. 22 C. 23 D. 80

✅ Answer: B

What is the first step in securing router access? A. Configure VTY lines B. Set hostname C. Set enable secret D. Disable HTTP access

✅ Answer: C

What does the command banner motd do? A. Sets login password B. Displays a login message C. Displays the prompt D. Sets the hostname

✅ Answer: B

Which command allows saving configuration on exit? A. exit save B. copy run exit C. write D. copy running-config startup-config

✅ Answer: D

What command exits back to user EXEC mode from global config mode? A. disable B. exit C. end D. quit

✅ Answer: C

What is the first mode you enter when powering on a router? A. ROMMON B. User EXEC C. Privileged EXEC D. Global Config

✅ Answer: B

What is the symbol for user EXEC mode? A. # B. $ C. > D. %

✅ Answer: C

What command enters the configuration of line console 0? A. line console 0 B. console 0 C. int console D. enable console

✅ Answer: A