CCNA Chapter 1
Describe 3 types of network attacks and their solutions, including recommended devices. - 1)
Reconnaissance - Mitigation: ACL's Devices: IPS, IDS, routers 2) Access - Mitigation: Authentication, port
security, virtual LANs (VLANs), ACLs, virtual private networks (VPNs) Devices: Switches, routers, firewalls,
IPS, IDS 3) DoS - Mitigation: ACL's Devices: IPS, IDS, firewalls, routers.
Describe a distributed network attack. - An adversary introduces code, such as a Trojan horse or
back-door program, to a "trusted" component or software that will later be distributed to many other
companies and users.
__________ has both physical and logical ring topologies. - FDDI
A __________ topology describes how devices communicate with each other. - Logical
A __________ topology uses a single cable to connect all devices together. - Bus
A brute-force password attack would be classified as what kind of attack? - Access
Describe 3 logical security controls. - Idle timeout on logins, passwords, and authentication
methods.
Describe 4 physical security controls. - Sign in and out logs, locks, guards, and doors.
Describe a bus topology. - All components are connected to and share a single wire using special
types of connectors or transceivers.
Describe a circuit-switched service. - It provides a temporary connection across a phone circuit
and are typically used for backup of primary circuits and for temporary boosts of bandwidth.
, Describe a close-in network attack. - An adversary attempts to get physically close to network
components, data, and systems in order to learn more about a network or to cause damage.
Describe a dedicated circuit. - A permanent connection between two sites in which the bandwidth
is dedicated to that company's use. Common when services such as voice, video, and data, must traverse
the connection.
Describe a point-to-point topology. - It has a single connection between two components, and
two components can directly communicate without interference from other components.
Describe a possible DoS attack scenario. - Flooding millions of packets or injecting code into an
application or overrunning the buffer(s) of an application, causing it to crash.
Describe a ring topology. - Device one connects to device two, device two connects to device
three, and so on to the last device, which connects back to the first device. Ring topologies can be
implemented with a single ring or a dual ring.
Describe a star topology. - A central device has many point-to-point connections to other
components. Star topologies are used in environments where many different devices need to be
connected, with a hub or switch at the center of the star.
Describe an active network attack. - An adversary tries to bypass or break into secured systems
using stealth, viruses, worms, or Trojan horses, or by exploiting a discovered security vulnerability.
Describe an insider network attack. - An inside adversary attempts to eavesdrop, copy, or cause
damage to information, often using a sniffing tool such as Wireshark.
Describe cell-switched services. - "Cell-switched services provide the same features that dedicated
circuits offer, but their advantage is that a single device can connect to multiple devices on the same
interface. "
Describe full meshing. - Every network component is connected to every other network
component.
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