CCNA Study Guide

Rapid Spanning Tree is based on which IEEE protocol specification?

802.1W

What command will show the detailed statistics on a Fa 0/24 of Switch1, including errors?

Show interfaces

By default, Spanning-Tree would prefer a path with 4 Gigabit links to a path with a single FastEthernet link.

True

Which address does a switch learn and store in its mac address table?

source mac address

Dynamic Routes

the routing tables are automatically updated

Your pings are failing from end to end. What command will help you find at which hop they are failing?

traceroute

What command can you enter to allow Telnet to be supported in addition to SSH?

transport input telnet ssh

AAA stands for authentication, authorization, and accounting

True

Which of the following Cisco devices does not have a console port built into the chassis?

7900 series IP phone

How many layers are in a collapsed core design?

2

What is the default spanning-tree priority on a Cisco switch?

32768

Cat 5e cabling contains how many pairs of wires?

4 pairs

Which bits in the mac address 00c0.12d5.e398 identify the company that manufactured the NIC?

00c012 (OUI)

If you were deploying multiple access points using the 2.4 Ghz range, which 3 channels would provide non-overlapping coverage?

1, 6, 11

What are 5 network topologies?

1. Bus 2. Ring 3. Star 4. Tree 5. Mesh

The distance limitation for a single run of Cat5 ethernet cable is __________.

100 meters

What is the specification for a cable that is 100 Mb baseband made of copper twisted pairs?

100Base-TX

No matter how it's configured, a single switch port is considered what?

A separate collision domain

Used to resolve an IP address into a MAC address.

ARP

Which wireless mode allows devices to communicate directly via wireless without using an access point?

Ad Hoc

FTP, Telnet, SSH, HTTP and HTTPS

Application Layer

One side of an etherchannel is configured as Desirable. What modes when configured on the other side would negotiate an etherchannel?

Auto and Desirable

Devices that are on the same network segment are also on the same _______________.

Collision Domain

You receive many complaints from end users that all seem to reflect a different problem and you are unsure where to start. Which troubleshooting method should you use?

Bottom-Up

Everyone on the same VLAN belongs to the same:

Broadcast Domain and IP network

Which layer in the 3-tier hierarchical design is responsible for routing traffic between VLANs?

Distribution Layer

What would a cable that is rolled over with an RJ-45 connector on one end and a USB connector on the other end be used for?

Console Connection

Which layer in the 3-tier hierarchy would you be least likely to find hosts connected to switches?

Core

Which service uses both TCP and UDP ports?

DNS

What are the legitimate types of VLANs?

Data VLAN, Default VLAN, Voice VLAN, Native VLAN, Management VLAN

LLC, MAC, 802.3 Ethernet and 802.11 WiFi

Data-Link

Which OSI layer checks frames for errors?

Data-Link

Which Rapid Spanning Tree Protocol port state is a combination of standard 802.1D STP's disabled, blocking and listening states?

Discarding

Where does a Cisco device store its IOS locally?

FLASH

Because an access port can only be assigned to one VLAN, an end user with a PC workstation and an IP phone requires two switch ports.

False

You have a new switch with a STP priority that is lower than the current root bridge on the network. If added to the network, the new switch becomes the secondary root bridge and will be elected as the root bridge if the root bridge fails.

False

What does an ethernet switch do when it receives a broadcast frame?

Floods out all ports in the same vlan as the source

These are not considered clients or end devices

Hubs and Access Points

The links on one switch are configured as passive. What protocol and mode must be configured on the other side to form an etherchannel?

LACP, Active

CDP functions at:

Layer 2

What are the types of IPv6 Addresses?

Multicast, Anycast, Unicast

Where is the startup-config located on a Cisco router?

NVRAM

Which VLAN does not get tagged when going across a trunk link?

Native VLAN

Provides logical addressing and path determination/routing services

Network Layer

How does STP prevent forwarding loops at OSI Layer 2?

Port blocking

The IOS for a Cisco router is loaded into ___________ when the router is booted.

RAM

What is the most common connector used with ethernet cables?

RJ-45

These devices use network layer addresses configured by the administrator to forward traffic.

Routers

_________ connect different networks together and use network addressing such as ip addresses to forward traffic between networks.

Routers

What protocols use UDP?

TFTP and SNMP

You have configured an etherchannel consisting of three fastethernet links between two switches. What would happen if one of the fastethernet links fails?

Traffic will be load-balanced between the remaining ports

A router with a BGP autonomous system number of 65001 is peered with another router with the same BGP AS. What does this mean?

The routers are considered iBGP neighbors

You have several switches connected using trunk links and all are set to the default STP priority of 32768. Which switch will become the root bridge?

The switch with the numerically lowest mac address

Hubs are not reliable because

They forward traffic to all ports

What troubleshooting method would you use if you suspect that there is an application issue?

Top-Down

When would you need a USB adapter for a console cable?

When the Laptop or PC doesn't have an RS-232 serial port

How would you reconfigure the mac address on the ethernet NIC of a windows host?

You can't they are burned in

What are the default speed and duplex settings on a fastethernet interface of a Cisco switch?

auto/auto

Which address does a switch use to make forwarding decisions?

destination mac address

What is the purpose of the show ip ospf interface command?

displaying OSPF related interface information

What key word allows you to issue a "show" command while in configuration mode on a Cisco IOS device?

do

The ICMP "ping" command is used to verify layer 3 connectivity to a far end device. What type of packet does the far end send back?

echo reply

Switches

forward traffic based on destination mac address

What 2 items are required on a layer 2 switch in order to be able to access it remotely from another network?

ip address and default gateway

The switch with the ______________ ________________ becomes the root bridge.

lowest bridge-id

You have an etherchannel with two links built between two switches. Which link will spanning tree block?

neither

Static routes are configured by

network administrators

What command would you use to stop sending CDP communication on the interface connecting to your ISP?

no cdp enable

Where can a DNS server be located?

on the local network or the Internet

What command would you issue on a Cisco 2911 to discover the type of Cisco router that is directly connected on interface serial 0/0/0?

show cdp neighbor

What two commands could you use to verify an interface is configured as a trunk?

show interfaces trunk and show interfaces switchport

What command verifies whether any IPv6 ACLs are configured on a router?

show ipv6 access-list

How would you view the layer 2 addresses that have been dynamically learned by a switch?

show mac address table