CCNA 4 Quiz1
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- 1.A single 802.11g access point has been configured and installed in the center of a square office. A few wireless users are experiencing slow performance and drops while most users are operating at peak efficiency. What are three likely causes of this problem? (Choose two.)
- A.
Mismatched TKIP encryption
- B.
Null SSID
- C.
Cordless phones
- D.
Mismatched SSID
- E.
Metal file cabinets
- 2.Which type of attack is characterized by a flood of packets that are requesting a TCP connection to a server?
- A.
Denial of service
- B.
Brute force
- C.
Reconnaissance
- D.
Trojan horse
- E.
Man in the middle
- 3.What are two recommended ways of protecting network device configuration files from outside network security threats? (Choose two.)
- A.
Allow unrestricted access to the console or VTY ports.
- B.
Use a firewall to restrict access from the outside to the network devices.
- C.
Always use Telnet to access the device command line because its data is automatically encrypted.
- D.
Use SSH or another encrypted and authenticated transport to access device configurations.
- E.
Prevent the loss of passwords by disabling password encryption.
- 4.Which spread spectrum technology does the 802.11b standard define for operation?
- A.
IR
- B.
DSSS
- C.
FHSS
- 5.A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement, what is known about the network interface port?
- A.
This is a 10 Mb/s switch port.
- B.
This is a 100 Mb/s switch port.
- C.
This is an Ethernet port operating at half duplex.
- D.
This is an Ethernet port operating at full duplex.
- E.
This is a port on a network interface card in a PC.
- 6.Which routing protocol by default uses bandwidth and delay as metrics?
- A.
RIP
- B.
BGP
- C.
OSPF
- D.
IGRP
- E.
EIGRP
- 7.Which two values are used by Spanning Tree Protocol to elect a root bridge? (Choose two.)
- A.
MAC address
- B.
Bridge priority
- C.
IOS version
- D.
IP address
- E.
Speed of the links
- 8.
- A.
The session layer
- B.
The data link layer
- C.
The access layer
- D.
The network layer
- E.
The application layer
- 9.On point-to-point networks, OSPF hello packets are addressed to which address?
- A.
127.0.0.1
- B.
172.16.0.1
- C.
192.168.0.5
- D.
224.0.0.5
- E.
223.0.0.1
- 10.Which of the following describe the process identifier that is used to run OSPF on a router? (Choose two.)
- A.
It is locally significant.
- B.
It is globally significant.
- C.
It is needed to identify a unique instance of an OSPF database.
- D.
It is an optional parameter required only if multiple OSPF processes are running on the router.
- E.
All routers in the same OSPF area must have the same process ID if they are to exchange routing information.
- 11.Which two statements best describe the wireless security standard that is defined by WPA? (Choose two.)
- A.
It specifies use of a static encryption key that must be changed frequently to enhance security.
- B.
It requires use of an open authentication method.
- C.
It specifies the use of dynamic encryption keys that change each time a client establishes a connection.
- D.
It requires that all access points and wireless devices use the same encryption key.
- E.
It includes authentication by PSK.
- 12.What are some of the advantages of using a router to segment the network? (Choose two.)
- A.
Filtering can occur based on Layer 3 information.
- B.
Broadcasts are eliminated.
- C.
Routers generally cost less than switches.
- D.
Broadcasts are not forwarded across the router.
- E.
Adding a router to the network decreases latency.
- 13.There are no boot system commands in a router configuration in NVRAM. What is the fallback sequence that the router will use to find an IOS during reload?
- A.
TFTP server, Flash, NVRAM
- B.
ROM, NVRAM, TFTP server
- C.
NVRAM, TFTP server, ROM
- D.
Flash, TFTP server, ROM
- E.
Flash, NVRAM, ROM
- 14.In which circumstance are multiple copies of the same unicast frame likely to be transmitted in a switched LAN?
- A.
During high traffic periods
- B.
After broken links are re-established
- C.
When upper-layer protocols require high reliability
- D.
In an improperly implemented redundant topology
- E.
When a dual ring topology is in use
- 15.Which of the following describe private IP addresses? (Choose two.)
- A.
Addresses chosen by a company to communicate with the Internet
- B.
Addresses that cannot be routed through the public Internet
- C.
Addresses that can be routed through the public Internet
- D.
A scheme to conserve public addresses
- E.
Addresses licensed to enterprises or ISPs by an Internet registry organization
- 16.Which of the following describes the roles of devices in a WAN? (Choose three.)
- A.
A CSU/DSU terminates a digital local loop.
- B.
A modem terminates a digital local loop.
- C.
A CSU/DSU terminates an analog local loop.
- D.
A modem terminates an analog local loop.
- E.
A router is commonly considered a DTE device.
- 17.A router receives information about network 192.168.10.0/24 from multiple sources. What will the router consider the most reliable information about the path to that network?
- A.
A directly connected interface with an address of 192.168.10.254/24
- B.
A static route to network 192.168.10.0/24
- C.
A RIP update for network 192.168.10.0/24
- D.
A default route with a next hop address of 192.168.10.1
- E.
A static route to network 192.168.10.0/24 with a local serial interface configured as the next hop
- 18.Which three Layer 2 encapsulation types would be used on a WAN rather than a LAN? (Choose three.)
- A.
HDLC
- B.
FDDI
- C.
PPP
- D.
ATM
- E.
Frame Relay
- 19.Why will a switch never learn a broadcast address?
- A.
Broadcasts only use network layer addressing.
- B.
A broadcast frame is never forwarded by a switch.
- C.
A broadcast address will never be the source address of a frame.
- D.
Broadcast addresses use an incorrect format for the switching table.
- E.
Broadcast frames are never sent to switches.
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