Advanced Networking Finals

Which device connects multiple computers within the same LAN?

Router

Which device connects multiple LANs and sends data over the Internet?

Switch

Which network device filters and controls network traffic based on configured rules?

Firewall

What type of cable is best for connecting two buildings 150 meters apart at low cost?

Multimode Fiber

Which layer of the OSI model provides host-to-host communication?

Transport

What is the top layer of the OSI model?

Application Layer

What layer of the OSI model defines physical characteristics like voltage and connectors?

Physical Layer

Which type of fiber cable allows only one light path or mode to travel?

A single-mode fiber

The TCP/IP model layer that corresponds to OSI’s Data Link and Physical Layers is called the ______

Link Layer

Which OSI layer is responsible for data encryption and decryption?

Presentation

The model developed by ISO that standardizes communication into seven layers.

OSI Model

A physical connector commonly used in Ethernet networking with 8 pins

RJ-45

A twisted-pair cable type that is commonly used in LAN connections

UTP (Unshielded Twisted Pair)

The process of adding headers and trailers as data moves down the OSI Layers

Encapsulation

The process of removing headers and trailers as data moves up the OSI layers

De-encapsulation

Device that provides services or resources to other computers in a network

Server

Device that accesses or uses resources from a server

Client

The OSI layer that is responsible for establishing and terminating communication sessions

Session Layer

The OSI layer where switches primarily operate

Data Link Layer

What is the purpose of the preamble in an Ethernet frame?

To synchronize communication between devices

What is the function of the Frame Check Sequence (FCS) in an Ethernet Frame?

To detect errors in transmission

The unique hardware address assigned to every network device is called the

ARP (Address Resolution Protocol)

What type of message is sent by ARP when it wants to know a MAC address?

Broadcast 

In Ethernet LAN switching, which duplex mode allows devices to send and receive simultaneously?

Full duplex

The IPv4 address that represents all devices on a network is called the

Broadcast Address

Which field in the IPv4 header prevents packets from looping endlessly in the network?

Time to Live (TTL)

The IPv4 header’s “Version” field contains the value 4, indicating:

The protocol used is IPv4

The maximum size of a standard Ethernet frame is

1518 bytes

It is a 48-bit hardware address assigned to a network interface card

MAC Address

The 7-byte pattern that helps devices synchronize before transmission

Preamble

The protocol that maps an IP address to a MAC address

ARP (Address Resolution Protocol)

A diagnostic command used to test network connectivity and measure round-trip time

Ping

The field in an IPv4 header used to identify fragmented packets

Identification Field

The IPv4 field that decreases by 1 at each hop to avoid endless looping

Time to Live (TTL)

The address range 127.0.0.0 to 127.255.255.255 is known as the ____

Loopback Address

The field is the Ethernet frame that indicates the protocol type, such as IPv4 or IPv6

Type Field

A network device that operates at Layer 2 and uses MAC addresses to forward frames

Switch

It refers to frames smaller than 64 bytes, usually caused by transmission errors

Runts

The MAC address is a logical address assigned by the network administrator

False

The Frame Check Sequence (FCS) filed is an Ethernet frame is used to detect transmission errors.

True

The Preamble is an Ethernet frame marks the end of the frame

False

The Address Resolution Protocol (ARP) is used to map a MAC address to an IP address

False

Full duplex allows devices to send and receive data at the same time without collisions

True

The IPv4 field “Time to Live” (TTL) is used to measure how long a packet takes to reach its destination

False

The “Version” field in the IPv4 header identifies which IP protocol is being used

True

The loopback address range (127.0.0.0 to 127.255.255.255) is used to test the device’s own network interface

True

Runts are Ethernet frames that are larger than the maximum frame size (1518 bytes)

False

A router operates at the Data Link Layer of the OSI model

False

The Physical Layer of the OSI model is responsible for defining cable types, connectors, and voltages

True

A switch can connect two or more networks together 

False

TCP/IP is a protocol suite that allows devices to communicate over the internet

True

The Data Link Layer uses IP addresses to send data between devices

False

UTP cables are more expensive that fiber optic cables

False

The Presentation Layer is responsible for data translation, compression, and encryption

True

Fiber optic cables transmit data using electrical signals

False

The Transport Layer of the OSI model ensures reliable data delivery between devices

True

The Application Layer is only concerned with the hardware and electrical signals

False

Static routing automatically updates the routing table using dynamic routing protocols such as OSPF

False

A router will forward a packet to a destination if the destination is directly connected to the router.

True

VLANs are configured on switches to separate broadcast domains logically.

True

Trunk ports carry traffic from multiple VLANs over a single interface

True

Dynamic routing requires the network administrator to manually configure routes on each router

False

What is he default VLAN assigned to trunk ports in 802.1Q configuration?

VLAN 1

What does a router use to determine the best path to send an IP packet?

IP Routing Table

Which of the following is NOT a characteristics of dynamic routing?

It requires manual configuration

Which of the following is the primary role of a router in a network

To forward data backets between different networks

In VLAN tagging, which field in the 802.1Q header indicates which VLAN the frame belongs to?

VID (VLAN Identifier)

What does a router do when it receives a packet with a destination IP address that is not in its routing table?

Forwards the packet to the default gateway.