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Flashcards in CCNP - Packet Forwarding Deck (51)
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1

What does CSMA/CD stand for?

Carrier Sense Multiple Access/Collision Detection

2

What is CSMA/CD used for? CSMA/CD is used in what type of network?

Ensure that only one device talks at a time in a collision domain Wired Networks

3

What is a collision domain? What is a network device where collisions can occur?

shared media that connects different network devices same media network where packet collisions can occur. ex. hubs, switches

4

What is the broadcast address used with MAC addressing?

FF:FF:FF:FF:FF:FF

5

What is a broadcast domain?

where a broadcast message can reach all devices on a subnet

6

What network devices are used to separate boundaries of broadcast domains?

routers

7

Is each port on a hub in the same or different collision domain?

same domain

8

Rather then flooding all the traffic out every port, what do switches maintain in order to forward traffic to the destination MAC address Where is that routing data stored?

MAC Address Table CAM or TCAM Table

9

What occurs when there is an unknown unicast?

is flooded to every switch port

10

What is a VLAN? Do VLANs create single or multiple broadcast domains on the same network switch?

Virtual Local Area Network multiple broadcast domains

11

What term are VLANs also know as?

SVI (Switch Virtual Interface)

12

By default do network devices in a VLAN communicate with other devices in a different VLANs

no

13

Can access ports be assigned to multiple or a single VLAN?

single VLAN

14

When packets are transmitted or received on an access port are 802.1Q tags included?

not included

15

What does the MAC Address table contain?

forwarding information of mac addresses mapped to assigned ports.

16

In the OSI model, which layer does all traffic start?

Layer 7 the application layer.

17

The ARP protocol is responsible for?

mapping mac addresses to switch ports

18

What three ways can packets be configured to route?

static route entry default-gateway routing protocol

19

What is a static route?

manually configured route to a destination network

20

What is a default-gateway?

default static route for all network traffic

21

What is a routing protocol used for?

route and distribute data and network information

22

What is a Routing Information Base-RIB?

Default routing table

23

What would be considered a routed interface?

any interface on a router

24

What does packet switching relate to?

Way packets are moved to/from the input interface to the output interface or interfaces to CEF

25

Process switching requires what to be personally involved with every forwarding decision? What layer does process switching take place?

CPU - every packet is inspected by the CPU (Software) L3

26

How does fast-switching work?

Packet passes and forward from the CPU once then stored in fast-switching route cache for faster access

27

How does Cisco Express Forwarding CEF work? Benefit of using Cisco Express Forwarding CEF

CEF caches routing information in the FIB (Forwarding Information Base) and Layer 2 next hop address in an adjacent table. (all in L2 data plane) Ability to forward more packets faster

28

How does CEF handle routing information in specialized ASICs?

Layer 3 routing table (RIB) is copied down into the (hardware level) L2 data plane and stored in both FIB (Forwarding Information Base) and (next hop) adjacent tables

29

What does ASIC stand for? What are ASIC used for?

Application Specific Integrated Circuit Integrated circuit (IC) for a particular use, rather for general-purpose use

30

What does TCAM stand for? What is the TCAM used for? Is TCAM an extension of the CAM architecture? True/False

Ternary Content Addressable Memory allowing the matching and evaluation of packets on more than one field. True