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Which layer is considered the foundation for network communications in the OSI model?
a. Physical Layer
b. Application Layer
c. Transport Layer
d. Session Layer
Answer: a. Physical Layertestbook+1
What is the primary function of the Network Layer in the OSI model?
a. Formatting Data
b. Routing Data Packets
c. Physical Signal Encoding
d. User Interface
Answer: b. Routing Data Packetssanfoundry+2
Which device primarily operates at the Network Layer?
a. Switch
b. Router
c. Repeater
d. Bridge
Answer: b. Routerkentik+1
Which layer is responsible for error detection and correction in the OSI model?
a. Application Layer
b. Session Layer
c. Data Link Layer
d. Network Layer
Answer: c. Data Link Layertestbook+1
What is encapsulation in networking?
a. Separating Cables
b. Wrapping Data with Protocol Information
c. Encrypting Data
d. Assigning IP Addresses
Answer: b. Wrapping Data with Protocol Informationsanfoundry+1
Which protocol assigns dynamic IP addresses to hosts?
a. FTP
b. SMTP
c. DHCP
d. SSH
Answer: c. DHCPtestbook
Which addressing scheme does the Network Layer use?
a. MAC Address
b. Port Number
c. IP Address
d. Hostname
Answer: c. IP Addresssanfoundry+2
What is the default protocol for reliable delivery at the Transport Layer?
a. UDP
b. IP
c. TCP
d. HTTP
Answer: c. TCPkentik
In the OSI model, what does the Data Link Layer provide?
a. User Authentication
b. Routing
c. Frame Delimitation and Error Detection
d. Application Services
Answer: c. Frame Delimitation and Error Detectionkentik
Which layer in the OSI model ensures user applications can access network services?
a. Application Layer
b. Physical Layer
c. Data Link Layer
d. Network Layer
Answer: a. Application Layertestbook+1
The backbone of the OSI model for logical path selection is the:
a. Network Layer
b. Session Layer
c. Data Link Layer
d. Application Layer
Answer: a. Network Layersanfoundry+1
Which layer deals with establishing, maintaining, and terminating connections?
a. Presentation Layer
b. Transport Layer
c. Session Layer
d. Network Layer
Answer: c. Session Layerkentik+1
What is a 4-byte IP address composed of?
a. Network and MAC Address
b. Only Host Address
c. Network Address & Host Address
d. Subnet and Default Gateway
Answer: c. Network Address & Host Addresssanfoundry
Which of the following is not a function of the Network Layer?
a. Routing
b. Internetworking
c. Congestion Control
d. Error Control
Answer: d. Error Controlsanfoundry+1
Which statement about the infrastructure layer is correct?
a. Manages user applications
b. Handles packet forwarding and routing
c. Responsible for email transmission
d. Encrypts web traffic only
Answer: b. Handles packet forwarding and routinginterviewbit+2
Which hardware device is used for connecting multiple networks?
a. Hub
b. Router
c. Switch
d. Repeater
Answer: b. Routersanfoundry+1
The Physical Layer of the OSI model deals with:
a. Logical Addressing
b. Segmentation
c. Transmission of raw bits
d. Encryption
Answer: c. Transmission of raw bitskentik
In which layer are IP addresses assigned and interpreted?
a. Physical Layer
b. Data Link Layer
c. Network Layer
d. Application Layer
Answer: c. Network Layersanfoundry+2
Which protocol operates at the infrastructure layer for dynamic host configuration?
a. DNS
b. DHCP
c. POP3
d. SMTP
Answer: b. DHCPtestbook+1
What is the main purpose of subnetting in networking?
a. Secure data transfers
b. Divide a network into logical segments
c. Encapsulate application data
d. Assign domain names
Answer: b. Divide a network into logical segmentssites.google+1
The Data Link Layer is subdivided into:
a. Logical Link Control and Frame Coordination
b. Logical Link Control and Media Access Control
c. Media Access Control and Network Control
d. Logical Access and Presentation
Answer: b. Logical Link Control and Media Access Controltestbook+1
In the OSI model, which layer comes immediately above the Network Layer?
a. Data Link Layer
b. Transport Layer
c. Session Layer
d. Presentation Layer
Answer: b. Transport Layerkentik+1
Which type of IP address is unique within a network?
a. Broadcast address
b. Unicast address
c. Multicast address
d. Anycast address
Answer: b. Unicast addresssanfoundry+2
Which function is performed by both routers and firewalls at the infrastructure layer?
a. Error Correction
b. Logical Path Selection
c. Data Formatting
d. Presentation Conversion
Answer: b. Logical Path Selectionsanfoundry+1
What is the basic unit of data handled at the Network Layer?
a. Frame
b. Segment
c. Bit
d. Packet
Answer: d. Packetsanfoundry+1
Which protocol is commonly used for transferring files over a network at the application layer?
a. TCP
b. FTP
c. DNS
d. ICMP
Answer: b. FTPinterviewbit+1
Which OSI layer is responsible for hardware addressing and access to the physical medium?
a. Session Layer
b. Network Layer
c. Data Link Layer
d. Application Layer
Answer: c. Data Link Layertestbook+1
The three broad types of network infrastructure are:
a. LAN, MAN, WAN
b. VLAN, VTP, RSTP
c. RSA, AES, DES
d. POP, IMAP, SMTP
Answer: a. LAN, MAN, WANcybersecurityhoy+1
Which layer is responsible for end-to-end communication and reliability?
a. Network Layer
b. Session Layer
c. Transport Layer
d. Presentation Layer
Answer: c. Transport Layerkentik+1
A MAC address is used at which layer of the OSI model?
a. Transport Layer
b. Network Layer
c. Data Link Layer
d. Application Layer
Answer: c. Data Link Layertestbook+1
In IPv4 addressing, how many bits are in a standard address?
a. 32
b. 48
c. 64
d. 128
Answer: a. 32sanfoundry+2
Which protocol is responsible for sending error and control messages within the Network Layer?
a. TCP
b. ICMP
c. HTTP
d. SMTP
Answer: b. ICMPsanfoundry+1
Routers use which information to route packets?
a. Application Ports
b. Physical Addresses
c. IP Addresses and Subnet Masks
d. File Types
Answer: c. IP Addresses and Subnet Maskssanfoundry+1
The process of breaking down large networks into smaller, manageable segments is called:
a. Routing
b. Packet Switching
c. Subnetting
d. Encoding
Answer: c. Subnettingsites.google+1
Which protocol enables devices to resolve hostnames to IP addresses?
a. SMTP
b. DNS
c. HTTP
d. ARP
Answer: b. DNSinterviewbit+1
Which is a broadcast domain boundary in a typical Layer 2 network?
a. Switch
b. Router
c. Hub
d. Cable
Answer: b. Routersanfoundry+1
What topology does the physical infrastructure layer use most commonly in modern LANs?
a. Ring
b. Mesh
c. Star
d. Bus
Answer: c. Starcybersecurityhoy+1
Which protocol does the Data Link Layer use to resolve IP addresses to MAC addresses?
a. FTP
b. ARP
c. TCP
d. HTTP
Answer: b. ARPkentik+1
The OSI reference model consists of how many layers?
a. 4
b. 5
c. 6
d. 7
Answer: d. 7interviewbit+2
The main advantage of a hierarchical network infrastructure is:
a. Security
b. Easy Management and Scalability
c. High Latency
d. More Hubs
Answer: b. Easy Management and Scalabilitycybersecurityhoy+1
What converts binary data into signals suitable for transmission at the Physical Layer?
a. Router
b. Modem
c. Switch
d. Bridge
Answer: b. Modemkentik
Which layer is responsible for flow control and multiplexing?
a. Data Link Layer
b. Transport Layer
c. Network Layer
d. Physical Layer
Answer: b. Transport Layertestbook+1
A VLAN is created at which layer?
a. Data Link Layer
b. Network Layer
c. Session Layer
d. Transport Layer
Answer: a. Data Link Layercybersecurityhoy+1
Which addressing is used at the Data Link Layer?
a. IP Address
b. MAC Address
c. Port Number
d. Domain Name
Answer: b. MAC Addresstestbook+1
What is the main role of the infrastructure layer in cloud networking?
a. Provide application interfaces
b. Manage scalability, security, and interconnectivity
c. Maintain user accounts
d. Encrypt all communications
Answer: b. Manage scalability, security, and interconnectivitycybersecurityhoy+1
Which protocol in the infrastructure layer is widely used to monitor and manage network devices?
a. SMTP
b. FTP
c. SNMP
d. POP3
Answer: c. SNMPinterviewbit+1
In IPv6, the address length is:
a. 32 bits
b. 64 bits
c. 128 bits
d. 256 bits
Answer: c. 128 bitssites.google+1
What is the main difference between a switch and a router?
a. Switches connect devices within a network; routers connect different networks
b. Routers power devices; switches do not
c. Switches assign IP addresses; routers assign MAC addresses
d. Routers operate at Layer 2; switches operate at Layer 3
Answer: a. Switches connect devices within a network; routers connect different networkssanfoundry+1
What is the function of NAT (Network Address Translation)?
a. Encrypt data
b. Translate private addresses to public addresses
c. Manage VLANs
d. Resolve domain names
Answer: b. Translate private addresses to public addressesinterviewbit+1
Which is NOT an example of network infrastructure hardware?
a. Bridge
b. Cable
c. Web browser
d. Router
Answer: c. Web browsercybersecurityhoy+1

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