CCNA S2- Version 4.1 Chaper 9 100%

 CCNA S2- Version 4.1 Chaper 9 100%


1. Refer to the exhibit. What are two possible causes for the interface status? (Choose two.)
The loopback address is not set.
*The encapsulation type is mismatched.
A cable is not attached to the interface.
*Keepalive messages are not being received.
The interface is administratively shut down.

2. A network administrator is upgrading a Cisco 1841 router by adding a WIC-2T module card. Which show command can the administrator use to verify that the module is correctly recognized by the router?
show flash:
*show version
show ip route
show startup-configuration

3. Which two conditions identify issues that are confined to Layer 1? (Choose two.)
*cables that exceed maximum length
encapsulation errors
viruses and worms that create excessive broadcast traffic
*poor termination of cables
receiving "line protocol down" messages on the router console

4. Refer to the exhibit. Which three statements are true about the output of the show ip interface brief command? (Choose three.)
*FastEthernet0/0 is functioning correctly.
*The shutdown command has been applied on Serial0/0.
FastEthernet0/0 was configured by the startup-config at bootup.
Serial0/0 is experiencing a Layer 1 network problem.
*FastEthernet0/1 is experiencing a Layer 2 network problem.
Because the port is down, Serial0/1 has an IP address that does not show in the output.

5. A network administrator plugs a new PC into a switch port. The LED for that port changes to solid green. What statement best describes the current status of the port?
There is a duplex mismatch error.
There is a link fault error. This port is unable to forward frames.
*The port is operational and ready to transmit packets.
This port has been disabled by management and is unable to forward frames.
The flash memory is busy.

6. A user is having trouble accessing the Internet. A network administrator begins by verifying that the IP address of the PC is correctly configured. Next the administrator pings the default gateway. Based on this information, what type of troubleshooting method is the administrator employing?
top-down
bottom-up
*divide-and-conquer
impossible to determine from this information

7. A user can access any web page on the Internet but cannot access e-mail. What troubleshooting method would be most efficient for troubleshooting this issue?
*top-down
bottom-up
divide-and-conquer
impossible to determine from this information

8. Which problem is associated with Layer 4 of the OSI model?
*A firewall is blocking Telnet packets to a host.
A host has an incorrect IP address.
A router has no route to a host.
A host sent a malformed HTTP request.

9. An administrator is creating a lab to simulate a WAN connection. During the setup, the administrator notices that there are different encapsulation types on each end of the serial connection. At what layer of the OSI model is this problem occurring?
*Layer 2
Layer 4
Layer 5
Layer 6

10. A PC is able to reach devices that are located both inside and outside the network. However, when trying to reach an FTP server that is located on the same subnet, the PC fails to make a connection. The administrator has several other PCs that are located in the same subnet try a connection to the FTP server and they are successful. Which troubleshooting tool can be used to determine the problem between the PC and the FTP server?
cable tester
digital multimeter
*protocol analyzer
network analyzer

11. Refer to the exhibit. Which IP address is misconfigured and is causing connectivity problems between hosts and servers?
HostA
HostB
Server1
*Server2
R1 Fa0/0
R1 Fa0/1

12. Refer to the exhibit. Users on the 10.12.10.0/24 network are unable to access anyone on the 10.10.10.0/24 network. What two problems exist in the network? (Choose two.)
*R2 is using a different version of RIP.
*R2 has a missing network statement.
R1 has an incorrect network statement.
R3 has an incorrect network statement.
A routing loop is occurring between all three routers.

13. Refer to the exhibit. A network administrator is in the process of sending a preconfigured text file to a router. When the administrator pastes the configuration into the router, an error message appears. What is the problem with the IP addressing scheme?
Serial0/0 is configured with a network address.
The IP address on FastEthernet0/0 overlaps with the IP on FastEthernet0/1.
Serial0/1 is configured with a broadcast address.
*The IP address on FastEthernet0/0 overlaps with the IP on Serial0/1.

14. Refer to the exhibit. Host H1 on the LAN is not able to access the FTP server across the Internet. Which two configuration statements are causing this problem? (Choose two.)
There is no route to the Internet.
The IP address on Fa0/0 is incorrect.
The IP address on S0/0/0 is incorrect.
*The NAT command on the Fa0/0 interface is applied in the wrong direction.
*The NAT command on the S0/0/0 interface is applied in the wrong direction.

15. Refer to the exhibit. The PC is trying to ping router B at 192.168.2.2, but it fails. What is the problem?
The PC is on the wrong subnet.
*The default gateway on the PC should be 192.168.1.1.
The default gateway should be 192.168.2.2.
The DNS server is incorrect.
The IP address for Fa0/0 on router A is incorrect.

16. How many usable host addresses does the 192.168.1.0/25 subnet provide?
254
128
127
*126
64

17. A network technician has isolated a problem at the transport layer of the OSI model. Which question would provide further information about the problem?
*Do you have a firewall that is configured on your PC?
Do you have a link light on your network card?
Is your PC configured to obtain addressing information using DHCP?
What default gateway address is configured in your TCP/IP settings?
Can you ping www.cisco.com?

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CCNA S2- Version 4.1 Chaper 8 100%

 CCNA S2- Version 4.1 Chaper 8 100%

1. Which benefit does SSH offer over Telnet when remotely managing a router?
*encryption
TCP usage
authorization
connection using six VTY lines

2. Which means of communication does an SNMP network agent use to provide a network management station with important but unsolicited information?
query
broadcast
ICMP ping
*trap
poll

3. What is the term used to describe the area of a network which stores servers that are accessible to any users from the Internet?
"clean" LAN
intranet
*DMZ
extranet

4. Before a technician upgrades a server, it is necessary to back up all data. Which type of backup is necessary to ensure that all data is backed up?
daily
differential
*full
incremental
partial

5. A company wants to configure a firewall to monitor all channels of communication and allow only traffic that is part of a known connection. Which firewall configuration should be deployed?
packet filtering
proxy
*stateful packet inspection
stateless packet inspection

6. Which three protocols describe methods that can be used to secure user data for transmission across the internet? (Choose three.)
SMTP
*IPSEC
*SSL
*HTTPS
FTP
TFTP

7. What network layer security protocol can secure any application layer protocol used for communication?
HTTPS
IMAP
FTPS
*IPSEC
TLS

8. Which three items are normally included when a log message is generated by a syslog client and forwarded to a syslog server? (Choose three.)
*date and time of message
*ID of sending device
length of message
*message ID
checksum field
community ID

9. What AAA component assigns varying levels of rights to users of network resources?
auditing
accounting
*authorization
access control
authentication
acknowledgement

10. A network administrator is assigning network permissions to new groups of users and employing the principle of least privilege. Which two actions should the administrator take? (Choose two.)
*Provide users with only the access to resources required to do their jobs.
*Provide the minimum level of permissions required for users to do their jobs.
Remove all permissions from the users and grant permissions as they are requested.
Allow users to decide how much permission they need to accomplish their job tasks.
Provide full access to the users and gradually remove privileges over time.

11. A hacker has gained access to sensitive network files. In analyzing the attack, it is found that the hacker gained access over a wireless segment of the network. It is further discovered that the only security measure in place on the wireless network is MAC Address Filtering. How is it likely that the hacker gained access to the network?
The hacker used a software tool to crack the shared hexadecimal wireless key.
*The hacker obtained the MAC address of a permitted host, and cloned it on his wireless laptop NIC.
The attacker mounted a denial of service attack to overwhelm the firewall before penetrating the wireless LAN.
The hacker gained wireless access to the MAC address database and added his own MAC address to the list of permitted addresses.

12. What is the advantage of using WPA to secure a wireless network?
It uses a 128-bit pre-shared hexadecimal key to prevent unauthorized wireless access.
*It uses an advanced encryption key that is never transmitted between host and access point.
It is supported on older wireless hardware, thus providing maximum compatibility with enterprise equipment.
It requires the MAC address of a network device that is requesting wireless access to be on a list of approved MAC addresses.

13. hat are two potential problems with using tape media to back up server data? (Choose two.)
Tape is not a cost-effective means of backing up data.
Data tapes are difficult to store offsite.
*Data tapes are prone to failure and must be replaced often.
*Tape drives require regular cleaning to maintain reliability.
Backup logs are not available with tape backup solutions.

14. Refer to the exhibit. While the user on router A is connected to router B through telnet, the CTRL-SHIFT-6 x keystroke is entered. What effect does this have?
It logs the user out of router A.
*It suspends the connection to router B.
It closes the connection to router B.
It logs the user out of both router A and router B.

15. What two measures help to verify that server backups have been successfully completed? (Choose two.)
*reviewing backup logs
*performing a trial restore
performing full backups only
replacing tape backup with hard disk-based backup
using an autoloader when backups require more than one tape

16. Which three applications can be used for in-band management? (Choose three.)
FTP
*HTTP
*SNMP
*Telnet
TFTP
DHCP

17. Which two characteristics of network traffic are being monitored if a network technician configures the company firewall to operate as a packet filter? (Choose two.)
*ports
physical addresses
packet size
frame sequence number
*protocols

18. Which AAA service provides detailed reporting and monitoring of network user behavior, and also keeps a record of every access connection and device configuration change across the network?
authentication
accreditation
*accounting
authorization

19. While downloading an IOS image from a TFTP server, an administrator sees long strings of exclamation marks (!) output to the console. What does this mean?
*The transfer is working.
The TFTP server is not responding.
The IOS file is corrupt and is failing the checksum verification.
There is not enough space in flash to hold the image.

20. What does the command copy flash tftp accomplish?
*It copies the IOS in flash to a TFTP server.
It copies the startup-configuration file in flash to a TFTP server.
It copies the running-configuration file in flash to a TFTP server.
It copies the configuration register settings in flash to a TFTP server.
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CCNA S2- Version 4.1 Chaper 7 100%

CCNA S2- Version 4.1 Chaper 7 100%

1. A client is communicating with a server on a different segment of the network. How does the server determine what service is being requested by the client?
applies the default service configured in directory services
uses ARP to discover the appropriate service from the local router
sends a request to the client asking for the appropriate service
*identifies the appropriate service from the destination port field

2. What is the function of the TCP three-way handshake?
It enables the synchronization of port numbers between source and destination hosts.
It immediately triggers the retransmission of lost data.
*It synchronizes both ends of a connection by allowing both sides to agree upon initial sequence numbers.
It identifies the destination application on the receiving host.

3. What are three unique characteristics of UDP? (Choose three.)
connection oriented
full-duplex operation
*low overhead
*no flow control
*no error-recovery function
reliable transmission

4. Within TCP, what combination makes up a socket pair?
source port with destination port
source IP address with destination port
source IP address and destination IP address
*source IP address and port with a destination IP address and port

5. What type of update allows client computers to register and update their resource records with a DNS server whenever changes occur?
*dynamic
zone transfer
local recursive query
root domain query
top-level domain query

6. Which DNS zone resolves an IP address to a qualified domain name?
dynamic lookup
forward lookup
resolution lookup
*reverse lookup

7. Which two tasks are the responsibility of the local DNS server? (Choose two.)
maintaining a large number of cached DNS entries
maintaining the ISP server
*mapping name-to-IP addresses for internal hosts
*forwarding name resolution requests to a caching-only server
forwarding all name resolution requests to root servers on the Internet

8. Which protocol is used to send e-mail, either from a client to a server or from a server to another server?
SNMP
FTP
*SMTP
HTTPS

9. A manufacturing company subscribes to certain hosted services from their ISP. The services required include hosted world wide web, file transfer, and e-mail. Which protocols represent these three key applications? (Choose three.)
*FTP
*HTTP
DNS
SNMP
DHCP
*SMTP

10. To meet customer expectations, an ISP must guarantee a level of service that is based on what two factors? (Choose two.)
accessibility
adaptability
*availability
*reliability
scalability

11. Which two statements are true about the OSI and TCP/IP models? (Choose two.)
The two bottom layers of the TCP/IP model make up the bottom layer of the OSI model.
The TCP/IP model is a theoretical model and the OSI model is based on actual protocols.
*The OSI network layer is comparable to the Internet layer of the TCP/IP model.
The TCP/IP model specifies protocols for the physical network interconnection.
*The TCP/IP model is based on four layers and the OSI model is based on seven layers.

12. What type of DNS server is typically maintained by an ISP?
*caching-only
root
second-level
top-level

13. Which two options correctly match protocol and well-known port number? (Choose two.)
DNS - 25
FTP - 110
*HTTP - 80
POP3 - 25
*SMTP - 25

14. What are three characteristics of HTTPS? (Choose three.)
It uses a different client request-server response process than HTTP uses.
It specifies additional rules for passing data between the application and data link layers.
*It supports authentication.
It allows more simultaneous connections than HTTP allows.
*It encrypts packets with SSL.
*It requires additional server processing time.

15. User1 is sending an e-mail to User2@cisco.com. What are two characteristics of the process of sending this data? (Choose two.)
It utilizes TCP port 110.
A TCP connection is established directly between the User1 and User2 client computers in order to send the e-mail message.
*It utilizes a store and forward process.
The same application layer protocol is used to send the e-mail and retrieve it from the destination server.
*SMTP is used to send the e-mail message to the mail servers.

16. Which three fields do a TCP header and a UDP header have in common? (Choose three.)
*source port
window
*checksum
*destination port
acknowledgment number
sequence number

17. When a host is communicating with multiple applications on the same server at the same time, which two values will likely be the same in all packets for each session? (Choose two.)
*IP address
*MAC address
session number
sequence number

18. What are three characteristics of network reliability? (Choose three.)
*Redundant hardware provides enhanced reliability.
Reliability is measured based on the number of applications in use on the network.
The longer the MTTR, the greater the reliability.
*Fault tolerance is a measure of reliability.
*The longer the MTBF, the greater the reliability.
An ISP guarantees the same level of reliability to all of its customers.

19. Refer to the exhibit. Host1 is in the process of setting up a TCP session with Host2. Host1 has sent a SYN message to begin session establishment. What happens next?
Host1 sends an ACK message to Host2.
Host1 sends a SYN message to Host2.
Host1 sends a SYN-ACK message to Host2.
Host2 sends an ACK message to Host1.
Host2 sends a SYN message to Host1.
*Host2 sends a SYN-ACK message to Host1.

20. Refer to the exhibit. The PC is requesting HTTP data from the server. What is a valid representation of source and destination sockets for this request?
Source - 192.168.1.17:80 ; Destination - 192.168.2.39:80
Source - 192.168.1.17:80 ; Destination - 192.168.2.39:1045
*Source - 192.168.1.17:1045 ; Destination - 192.168.2.39:80
Source - 192.168.1.17:1045 ; Destination - 192.168.2.39:1061

21. Refer to the exhibit. Which two statements are true about this file? (Choose two.)
If the gateway address changes, the file will be updated dynamically.
*The command ping fileserv will use IP address 172.16.5.10.
*If the ping www.cisco.com command is issued, the file will be checked for the Cisco web server IP address before DNS is queried.
The command ping mypc will use IP address 172.16.5.1.
Name to IP address mappings are added to the file after they are received from DNS.

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CCNA S2- Version 4.1 Chaper 6 100%

 CCNA S2- Version 4.1 Chaper 6 100%

1. What is the purpose of a routing protocol?
It is used to build and maintain ARP tables.
It provides a method for segmenting and reassembling data packets.
It allows an administrator to devise an addressing scheme for the network.
*It allows a router to share information about known networks with other routers.
It provides a procedure for encoding and decoding data into bits for packet forwarding.

2. Why is fast convergence desirable in networks that use dynamic routing protocols?
Routers will not allow packets to be forwarded until the network has converged.
Hosts are unable to access their gateway until the network has converged.
*Routers may make incorrect forwarding decisions until the network has converged.
Routers will not allow configuration changes to be made until the network has converged.

3. In which situation would a company register for its own autonomous system number (ASN)?
when the company's ISP adds connection points to the Internet
when additional routers are added to the corporate internetwork
when more than one interior routing protocol is used
*when the company uses two or more ISPs

4. What term refers to a group of networks that uses the same internal routing policies and is controlled by a single administrative authority?
Internet
intranet
virtual private network
*autonomous system

5. Which protocol is an exterior routing protocol?
*BGP
EIGRP
OSPF
RIP

6. What device enables an ISP to connect with other ISPs to transfer data?
*border gateway router
DSLAM
web server
interior router

7. Which part of an IP packet does the router use to make routing decisions?
source IP address
source MAC address
*destination IP address
destination MAC address

8. What statement is true regarding an AS number?
*AS numbers are controlled and registered for Internet use.
Interior routing protocols require registered AS numbers.
ISPs require all customers to have registered AS numbers.
All routers at an ISP must be assigned the same AS number.

9. Which routing protocol is used to exchange data between two different ISPs?
*BGP
EIGRP
OSPF
RIP v2

10. Consider this routing table entry:

R 172.16.1.0/24 [120/1] via 200.1.1.1 00:00:27 Serial0/1

What type of route is this?
a static route
a default route
*a RIP route
an OSPF route
an EIGRP route
a directly-connected route

11. Refer to the exhibit. If all routers are running RIP and network 10.0.0.0 goes down, when will R3 learn that the network is no longer available?
in 30 seconds
in 60 seconds
in 90 seconds
*immediately

12. What information is included in RIPv2 routing updates that is not included in RIPv1 updates?
metric
*subnet mask
area identification
hop count
autonomous system number

13. What two types of businesses would benefit from registering as their own autonomous systems? (Choose two.)
a home business with one ISP connection
*a global business with connections to multiple local ISPs
*a medium-sized nationwide business with Internet connectivity through different ISPs
a large enterprise with two connections to the same ISP
a small ISP with a single Internet connection through a larger ISP

14. Which two statements describe static routes? (Choose two.)
They are created in interface configuration mode.
*They require manual reconfiguration to accommodate network changes.
They automatically become the default gateway of the router.
*They are identified in the routing table with the prefix S
They are automatically updated whenever an interface is reconfigured or shutdown.

15. What is the difference between interior and exterior routing protocols?
Exterior routing protocols are only used by large ISPs. Interior routing protocols are used by small ISPs.
Interior routing protocols are used to route on the Internet. Exterior routing protocols are used inside organizations.
Exterior routing protocols are used to administer a single autonomous system. Interior routing protocols are used to administer several domains.
*Interior routing protocols are used to communicate within a single autonomous system. Exterior routing protocols are used to communicate between multiple autonomous systems.

16. Refer to the exhibit. Which configuration command or commands contributed to the output that is shown?
routerA(config-router)# no version 2
routerA(config)# interface fa0/0
routerA(config-if)# ip address 172.19.0.0 255.255.0.0
*routerA(config-router)# network 192.168.3.0
routerA(config)# no ip default-gateway

17. Refer to the exhibit. All of the routers are running RIP. There are two paths from router A to the 192.168.3.0 network. Based on the output of the show ip route command on router A, which route was entered into the routing table and why?
A,B,C,D because it has the lowest administrative distance
A,E,F,G,D because it has the lowest administrative distance
*A,B,C,D because it has the lowest metric
A,E,F,G,D because it has the lowest metric

18. What is the purpose of the network command in configuring RIP?
to specify whether RIPv1 or RIPv2 will be used as the routing protocol
to allow the router to monitor RIP updates that occur on other routers
*to identify the directly connected networks that will be announced in RIP updates
to configure the IP address on an interface that will use RIP
to identify all of the remote networks that should be reachable from the router

19. Refer to the exhibit. If connectivity between the two hosts is maintained, what is the maximum number of RIP routers that can be in the path from HostA to HostB?
14
*15
16
17

20. Refer to the exhibit. Router B receives a packet with a destination address of 10.16.1.97. What will router B do?
drop the packet
forward the packet via the route to 10.16.1.0
forward the packet via the route to 10.16.1.64
*use the default route
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