CCNA - Networking
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| What device is used to separate subnets? | show 🗑
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| show | 255.0.0.0 (Class A)
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| What is the first octet range for Class A networks? | show 🗑
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| show | 129-191
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| What is the first octet range for class C networks? | show 🗑
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| What is the maximum number of Class A networks available? | show 🗑
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| show | 16
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| What is the maximum number of Class C networks available? | show 🗑
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| show | 10.0.0.0/8
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| show | IEEE 802.3
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| Who originally develeoped Ehthernet? | show 🗑
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| What does Ethernet do when it detects a collision | show 🗑
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| When not using auto-detect | show 🗑
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| show | Carrier Sense Multiple Access with Collision Detection (CSMA/CD)
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| show | 1518 bytes
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| show | 802.3u
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| show | 100 Mbps
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| What cable type is required for 10BaseT? | show 🗑
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| What are the three types of Fast Ethernet? | show 🗑
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| show | Cat5
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| What cable type does 100BaseFX require? | show 🗑
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| show | Cat3 (uses 2 extra wires)
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| show | IEEE 802.3z
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| What is the 5-4-3 rule? | show 🗑
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| show | a Layer 2 device that connects different or same-type networks
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| Does a bridge allow broadcasts? | show 🗑
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| show | not if the destination segment is the same as the originating segment
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| How much latency does a bridge introduce? | show 🗑
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| show | enable communications between different protocols
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| show | nondesignated- they neither send nor receive traffic
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| What mode are nondesignated ports in? | show 🗑
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| show | to provide reliable transfer of data across a physical network link
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| show | Data Link layer
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| show | the Data Link layer
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| show | 24-bit Organizationally Unique Identifier (OUI) and 24-bit vendor-supplied number
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| show | a burned-in address (BIA)
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| How long is an IPX address? | show 🗑
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| show | 4-byte network address and 6-byte node address (MAC address)
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| show | ARP
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| What does an IP host do when it needs to find the MAC address of a local host? | show 🗑
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| show | the Network layer
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| show | hosts periodically broadcast their MAC address
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| show | the MAC address of the host is embedded in the network address
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| show | Xerox Network Service (XNS)
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| show | data packets and route update packets
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| What layer(s) can alter data? | show 🗑
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| show | the Session layer
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| What specification defines the MAC sublayer? | show 🗑
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| What does the MAC sublayer define? | show 🗑
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| What specification defines the LLC sublayer? | show 🗑
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| show | identifies network-layer protocols and encapsulates them
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| What layer does Data Communicaton Equipment (DCE) operate at? | show 🗑
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| What layer does Data Terminal Equipment operate at? | show 🗑
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| show | the Physical layer
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| Where is Data Terminal Equipment (DTE) usually located? | show 🗑
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| show | at the client end
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| show | accessing DTE services
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| show | ease of troubleshooting; standard interface; and industry specialization
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| How long are IPX addresses? | show 🗑
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| show | 1st 4 bytes: network address; rest: node address (MAC address)
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| What does each layer of the OSI model use to encapsulate data? | show 🗑
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| show | segments
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| What does the Network layer use as a PDU? | show 🗑
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| show | frames
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| What does the Physical layer use as a PDU? | show 🗑
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| show | synchronize; negotiate connection; synchronize; and acknowledge
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| show | call setup (connection establishment); data transfer; and call termination
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| show | security; broadcast control; performance; and scalability
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| Why is Layer 2 switching considered hardware-based bridging? | show 🗑
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| What are the 2 advantages of application-specific integrated circuits (ASIC's)? | show 🗑
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| What OSI layer are filter tables part of? | show 🗑
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| show | by reading the source hardware address of each frame that passes through
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| What does transparent bridging refer to? | show 🗑
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| What does a layer 2 device do with a frame with an unfamiliar hardware address? | show 🗑
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| show | but not on a hub?
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| show | with a binary 0
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| How must all Class B IP addresses start? | show 🗑
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| show | with a binary 110
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| show | 2? - 2
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| show | 2? - 2
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| show | 256 - last octet of subnet mask
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| show | Process/Application
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| What OSI layer(s) does the Process/Application layer map to? | show 🗑
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| show | the Transport layer
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| show | the Network layer
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| show | the Data Link and Physical layers
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| show | the Internet layer
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| show | the Internet layer
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| show | sending updates to routers about route or packet problems
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| What does a router do if it can't forward a datagram? | show 🗑
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| What does a router do if its memory buffer is full? | show 🗑
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| show | the last router to receive it deletes it and sends an obituary message via ICMP
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| show | ICMP
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| What is a core router? | show 🗑
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| show | Route summarization is the process of using a single network address and mask (or prefix) to represent multiple networks or subnetworks.
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| What is route redistribution? | show 🗑
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| show | Full mesh is a network in which every router maintains a direct connection to every other router.
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| show | The access layer uses the 2600
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| What is scalability? | show 🗑
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| What does FIFO stand for? | show 🗑
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| What does DDR stand for? | show 🗑
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| show | Custom queuing is a method of queuing that is used to guarantee bandwidth for traffic by assigning queue space to each protocol.
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| show | Cisco Express Forwarding is a switching mode on a Cisco router that uses a Forwarding Information Base (FIB) lookup table that contains all known routes that exist in the routing table. CEF eliminates route cache maintenance and can switch traffic more ef
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| What is WFQ (weighted fair queuing)? | show 🗑
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| show | Compression is the running of a data set through an algorithm that reduces the space required to store the data set or the bandwidth required to transmit the data set.the
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| What is priority queuing? | show 🗑
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| What is unequal-cost load balancing? | show 🗑
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| What is a policy? | show 🗑
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| What is an Access router? | show 🗑
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| show | Dial-on-demand routing is a technique by which a router can dynamically initiate and close circuit switched sessions as transmitting end stations need them.
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| What does CEF stand for? | show 🗑
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| show | A three-layer network design model is a hierarchical model for scalable network design that consists of core
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| show | Fast switching is a switching mode on a Cisco router that uses a high-speed route cache after an initial routing table lookup.
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| show | A distribution router is a router that separates the access layer and core layer by establishing routing and security policies.
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| What is equal-cost load balancing? | show 🗑
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| What is FIFO (first in | show 🗑
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| What is queuing? | show 🗑
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| What Cisco series routers are used at the distribution layer? | show 🗑
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| show | WFQ stands for weighted fair queuing.
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| show | Process switching is a process that involves the switching of entire packets to the router CPU
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| What Cisco series routers are used at the core layer? | show 🗑
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| show | An incremental routing update is a routing update that contains information only about routes that have changed.
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| What Cisco series routers are used at the access layer? | show 🗑
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| show | Packet switching on a router is the process of receiving a packet on one interface and then forwarding it out another interface.
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| show | Tunneling is an architecture that is designed to provide the services necessary to implement any standard point-to-point encapsulation scheme.
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| What are two types of Layer 1 network devices? | show 🗑
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| What are some network devices that operate at the data link layer (Layer 2)? | show 🗑
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| show | A collision domain defines a group of devices connected to the same physical medium. A collision occurs when two packets are sent at the same time and collide with each other (electronically). When a collision occurs
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| What devices are used to break up collision domains? | show 🗑
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| show | Routers and some multilayer switches function at the network layer (Layer 3) of the OSI model. Both devices learn
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| What three pieces of info are found in a routing table? | show 🗑
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| One interface on a router creates how many broadcast and how many collision domains? | show 🗑
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| show | 0
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| In addition to learning the remote network and providing a path to the network | show 🗑
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| Does a router forward broadcasts or multicasts? | show 🗑
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| show | Yes
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| Can routers provide QoS for specified types of network traffic? | show 🗑
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| show | A broadcast domain defines a group of devices that receive each others' broadcast messages. As with collisions
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| show | Routers are used to break up broadcast domains. They create more broadcast domains and smaller broadcast areas.
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| show | Yes
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| show | All of today's networks have physical and logical topologies. Physical topologies refer to the physical layout of devices and network media. Logical topologies refer to the logical paths in which data accesses the medium and transmits packets across it.
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| show | The five most common physical network topologies implemented today are: - Bus - Ring - Star - Extended star - Mesh
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| What physical network topology connects all devices to one cable? | show 🗑
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| show | A star or extended star physical topology is made up of a central connection point
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| Describe a ring topology. | show 🗑
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| show | A mesh network connects all devices to each other for fault tolerance and redundancy.
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| What PC component is considered the "brains" of the computer? | show 🗑
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