2.1.1 Layer 1 - Physical

Which layer of the OSI model is responsible for the physical transmission of data?

What is a primary function of Layer 1 in the OSI model?

Which of the following physical mediums can be utilized in Layer 1?

What is the role of a network interface card (NIC) in the context of Layer 1?

What does a 'Layer 1 standard' specify?

In Layer 1 networking, what happens when multiple devices transmit simultaneously?

What aspect of network communication is NOT provided by Layer 1?

A device that operates at Layer 3 of the OSI model necessarily includes the functionality of which other layer(s)?

What is the main functionality of a hub in a Layer 1 network?

In the context of Layer 1, what does it mean for devices to have a 'shared understanding of the physical medium'?

Which of the following is a characteristic of Layer 1 networking?

If Layer 1 is 'dumb', what intelligence does the layer possess?

What is a significant limitation of Layer 1 networks that impacts their scalability?

Why is device-to-device communication not possible in a pure Layer 1 network?

What is the consequence of using a shared physical medium in Layer 1 networking?

How does the concept of a 'collision domain' relate to Layer 1 networks?

Why are collisions almost guaranteed in a Layer 1 hub network?

Which of the following best describes the upgrade path intended to resolve the limitations with Layer 1 networking?

Consider two laptops connected via a copper cable using a Layer 1 standard. If one laptop transmits a signal representing binary '1' as +1 Volt and binary '0' as -1 Volt, what must be true for the other laptop to correctly interpret this signal?

Suppose a network engineer is tasked with connecting four devices in a Layer 1 network using a hub. Which of the following considerations is MOST critical for ensuring reliable communication?

In a Layer 1 network, what is the most likely outcome if two devices start transmitting data at precisely the same moment?

How does upgrading to Layer 2 from Layer 1 enhance network functionality?

Regarding the OSI model: Which layer handles routing?

Referencing the OSI Model, which of the following is true about Host Layers?

Which of the following is a shared medium for Layer 1 communication?

How do Layer 1 specifications ensure interoperability?

Which of the following is true for nodes using a Layer 1 hub?

Which of the following media access options are available at Layer 1?

Which of these is NOT a direct consideration of Layer 1?

In a Layer 1 environment, what typically leads to data corruption?

What is the primary reason Layer 1 networks do not scale efficiently?

Why would a network architect choose to upgrade a Layer 1 network to incorporate Layer 2 protocols?

Consider an older network that uses hubs for connectivity. Users complain of slow performance because of frequent data collisions. Upgrading which would most directly address this issue?

A network is set up using only Layer 1 devices (hubs). A device transmits a packet, but the intended receiver does not receive it. What is the most probable cause?

A security consultant is asked to evaluate a network that relies predominantly on Layer 1 hubs. What inherent security concern should the consultant highlight, and why?

What characteristic defines the operation of a Layer 1 hub?

How would you best describe the scalability of a network confined to operate at Layer 1 of the OSI model?

What is the fundamental function of Layer 1 standards in networking?

In a Layer 1 network implemented with hubs, what happens when two devices attempt to transmit data simultaneously?

What key feature is missing in Layer 1 networking that prevents devices from directly communicating with a specific recipient?

Which of the following physical mediums can be used for Layer 1?

What intelligence is associated with Layer 1 devices?

Which statement accurately reflects a limitation presented by Layer 1 operation?

Within a network using only Layer 1, what would be the effect of two devices transmitting simultaneously?

If a network engineer were deliberately tasked with creating a network environment with the highest possible chance of packet collisions, what configuration should they implement?

At which layer of the OSI model does the physical transmission and reception of raw bit streams occur?

Which of the following best describes the role of 'specifications' in Layer 1 networking?

In Layer 1 networking, what is the primary consequence of using a shared physical medium?

Why is it accurate to describe Layer 1 as 'dumb'?

Which of the following is a key limitation of Layer 1 networks that affects their scalability?

What fundamental aspect is lacking in Layer 1 networking that prevents device-to-device communication?

In a Layer 1 network, what occurs when multiple devices attempt to transmit data simultaneously?

Considering two laptops connected via a copper cable in a Layer 1 network, what shared understanding is essential for successful data transmission?

Which of the following describes a primary function of a Layer 1 hub in a network?

What distinguishes Layer 2 from Layer 1 in terms of network communication capabilities?

What is meant when it is stated that Layer 1 networks operate in a single 'collision domain'?

If a network engineer is told that 'Layer 1 has no media access control,' what implications does this have for network design and performance?

Which of the following most accurately describes the flow of data in a Layer 1 network utilizing a hub?

What is the significance of voltage levels in Layer 1 with copper cable?

A network using only Layer 1 devices struggles to scale. Why?

If you have two devices connected by a Layer 1 connection and one device transmits data, what is guaranteed?

A network consultant recommends upgrading from Layer 1 to Layer 2. What key improvement will this bring?

In a network comprised exclusively of Layer 1 devices, what is the most effective strategy to minimize the probability of data collisions?

A network engineer discovers unusually high rates of packet corruption in a network segment utilizing hubs. What is the most likely cause?

What is the fundamental limitation that Layer 1 imposes on network security?

A network administrator is tasked with connecting several computers in a small office using only Layer 1 technology. Which of the following layouts would be MOST susceptible to performance degradation due to collisions?

Consider a scenario where two laptops are connected via a copper cable in a Layer 1 network, and one laptop begins transmitting. What is the status of the other laptop?

Assume a network is running exclusively on Layer 1 with multiple devices connected via hubs. A user reports extremely slow network speeds. What's the most likely cause, and how can it be directly addressed without moving to higher layers?

What is the primary obstacle in creating a secure network based solely on Layer 1 technologies?

In a purely Layer 1 network environment, what is the most plausible consequence of increasing the physical length of the cable connecting two devices?

A team of engineers works on a network only employing hubs. The team wants to identify transmission problems. What is the challenge associated with using only Layer 1 for diagnosing network issues?

Given a Layer 1 network using hubs and copper cables, what is the MOST effective countermeasure an attacker could exploit to disrupt network operations, assuming they have physical access to the cabling?