CCNA 200-301 Domain 4: IP Services
Consider the following log message generated by a router: *Aug 8 11:18:12.081: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down What facility generated this message?
%LINEPROTO
Consider the following log message generated by a router: *Aug 8 11:18:12.081: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down What is the severity level of this message?
-5-
How many packets per minutes are required to keep two machines synchronized to an accuracy of a millisecond of each other?
1
You have configured DHCP on your router. A partial configuration is shown below: hostname RouterA ! interface FastEthernet0/0 ip address 192.168.11.1 255.255.255.0 speed auto duplex auto ! interface FastEthernet0/1 ip address 192.168.12.1 255.255.255.0 speed auto duplex auto ! ip dhcp excluded-address 192.168.11.1 192.168.11.50 ! ip dhcp pool 0 network 192.168.11.0 255.255.255.0 domain-name westsim.com dns-server 192.168.11.2 192.168.12.2 ! ip dhcp pool 2 host 192.168.11.166 hardware-address 02c7.f800.0422 ! access-list 1 permit 192.168.11.0 0.0.0.255 ! Srv2 is a host connected to the Fa0/0 interface of RouterA with a MAC address of 02c7.f800.0422. When it boots, it is assigned the IP address of 192.168.11.166. It can only communicate with hosts on the same subnet. What should you do to correct the problem?
Add a default-router statement to DHCP pool 2.
Your router generates a log message with a severity level of 6. What does this indicate?
An informational message only.
Many queue schedulers are able to identify a low-latency queue. What do queue schedulers do when processing low-latency queues?
Before the scheduler moves on to other queues, the low-latency queue must first be cleared.
Data on the network is being processed as it comes in. Which QoS method is being used?
Best Effort
You need to set the time zone for Pacific Daylight Time. Which two of the following commands will allow you to do this?
Clock timezone PST Clock timezone -8
For each operation on the right, match the appropriate command from the list on the left.
Configure DNS server addresses for the router to use for resolving hostnames. ip name-server Create static entries for hosts that associate each hostname with an IP address. ip host Prevent the router from using DNS to resolve hostnames. no ip domain-lookup Set the DNS name used by the router. hostname
You have a small network connected to the internet as shown in the Exhibit. Router1 will provide NAT services to all hosts on the private network and DHCP services to hosts connected to SubnetA. Srv1 is located on SubnetA. You want to make sure that this server is assigned the same IP address every time it boots, but you still want to centrally manage the address that it uses. What should you do?
Configure a DHCP binding for Srv1.
You have a small network as shown. You configure DHCP on Router1 to provide IP addresses to all hosts connected to SwitchA. Following the configuration, you verify that Wrk1 has received an IP address from the DHCP service. Wrk1 can ping every host on the subnet, but cannot communicate with any hosts connected to Switch B or on the internet. What should you do?
Configure the DHCP server to deliver the default gateway address along with the IP address.
You are a field technician for a large company. You have been sent to a remote site to troubleshoot a downed router. When you arrive at the remote site, how will you connect your laptop to the router?
Connect the laptop's COM/USB port to the router's console port using a rollover cable.
You want to configure DHCP on your Cisco router to provide automatic IP address assignment to a single subnet. You will use 192.168.12.0/27 for the subnet address. The router interface has been configured with an IP address of 192.168.12.1. Additionally, you want to make sure that a specific server, SrvFS, always gets the last IP address on the subnet. How should you configure DHCP on the router? (Select two.)
Create a DHCP binding for address 192.168.12.30. Create an address pool with a start address of 192.168.12.2 and end address of 192.168.12.30.
Listed below are several places that a workstation checks to resolve DNS hostnames. - A. Primary DNS server - B. Secondary DNS servers - C. HOSTS file - D. Local DNS cache In a browser, you type the name of a website. In which order will these locations be checked during the name resolution process?
D, C, A, B
You have a TCP/IP network with 50 hosts. There have been inconsistent communication problems between hosts. You run a protocol analyzer and discover that two hosts are assigned the same IP address. Which protocol can you implement on your network to help prevent problems such as this?
DHCP
You are setting up a new branch office for your company. You would like to implement solutions to provide the following services: - Hosts should be able to contact other hosts using names such as server1.westsim.com. - IP address assignment should be centrally managed. Which services should you implement on your network to meet the requirements? (Select two.)
DHCP DNS
You have a DHCP server on your network. Which of the following is the correct order of DHCP messages exchanged between a client and server when the client obtains an IP address using a 4-way handshake?
DHCPDISCOVER, DHCPOFFER, DHCPREQUEST, DHCPACK
You want to implement a protocol on your network that allows computers to find the IP address of a host from a logical name. Which protocol should you implement?
DNS
A user is playing an online game. When they press a key to perform an action, it takes at least one second for the action to be performed on screen. Which QoS metric is having issues?
Delay
Which of the following services automatically creates and deletes DNS host records when an IP address lease is created or released?
Dynamic DNS
Quality of Service (QoS) prioritizes traffic from different data streams by using two classification systems. Match the name of the QoS classification system on the left with the appropriate descriptions on the right. (Each classification system may be used once, more than once, or not at all.)
Individual frames are marked and classified at Layer 2. : Class of Service (COS) Classification occurs at Layer 3. : Differentiated Services Code Point (DSCP) Precedence values are inserted in the DiffServ field of an IP packet. : Differentiated Services Code Point (DSCP) A priority value between 0 and 7 is assigned to a 3-bit field. : Class of Service (COS) Up to 64 different classifications are possible. : Differentiated Services Code Point (DSCP)
You have implemented a QoS model where each application must request network resources. The router will approve or deny the request based on available resources. Which QoS model is being used?
Integrated Services
Which of the following are common network traffic types that QoS is used to manage? (Select two.)
Interactive applications Streaming video
Which of the following statements about the dynamic host configuration protocol (DHCP) are true? (Select two.)
It can deliver other configuration information in addition to IP addresses. A DHCP server assigns addresses to requesting hosts.
You have configured DHCP on your router. A partial configuration is shown below: hostname RouterA ! interface FastEthernet0/0 ip address 192.168.11.1 255.255.255.0 speed autoduplex auto ip access-group 1 in ! interface FastEthernet0/1 no ip address speed auto duplex auto ! ip dhcp excluded-address 192.168.11.1 192.168.11.50 ip dhcp excluded-address 192.168.12.1 192.168.12.50 ! ip dhcp pool 0 network 192.168.11.0 255.255.255.0 domain-name westsim.com dns-server 192.168.11.2 192.168.12.2 default-router 192.168.11.1 ! ip dhcp pool 1 network 192.168.12.0 255.255.255.0 domain-name westsim.com dns-server 192.168.12.2 192.168.11.2 default-router 192.168.12.1 ! ip dhcp pool 2 host 192.168.12.166 hardware-address 02c7.f800.0422 ! access-list 1 permit 192.168.11.0 0.0.0.255 ! Srv2 is a host connected to the Fa0/1 interface of RouterA. Its MAC address is 02c7.f800.0422 and is configured to use DHCP to request an IP address. Which of the following addresses will most likely be assigned to Srv2 when it boots?
It will not be assigned an IP address.
Queue schedulers are used for congestion management and define how a device will work through its queue. Match the names of the most commonly used queue schedulers on the left with the appropriate description on the right. (Each name can only be used once.)
Labels one queue as priority. Rotates through the queues and sends out multiple packets from the priority queue. : Weighted Round Robin Rotates through each queue and processes and sends the next available packet. : Round Robin Assigns each queue a minimum bandwidth percentage. : Class-Based Weighted Fair Queuing
Match the DNS components on the left with its function on the right.
Managed by the Internet Corporation of Assigned Names and Numbers (ICANN). : Top-level domain Includes the host name and all domain names separated by periods. : Fully qualified domain name The part of a domain name that represents a specific host. : Hostname Has a complete copy of all the records for a particular domain. : Authoritative server The last part of a domain name. : Top-level domain Denotes a fully qualified, unambiguous domain name. : . (dot) domain
Real-time voice and video communications require a minimum level of quality in order to provide adequate services. The tables shown below contain the minimum metric specifications for real-time voice and video. From the drop-down lists below each table, select the communication type that the table pertains to.
Metric Description Bandwidth > 384 Kbps Delay < 400 ms Jitter < 50 ms Loss < .1%-1% Video Metric Description Bandwidth N/A Delay < 150 ms Jitter < 30 ms Loss < 1% VoIP
Which of the following is a benefit of using network address translation (NAT)?
NAT provides a measure of network security.
Which of the following statements are true regarding NTP when implemented on Cisco devices? (Select two.)
NTP runs over UDP port 123. When NTP is enabled, NTP packets are received on all interfaces.
You have a workstation configured with DNS server addresses as follows: - Primary DNS server = 192.168.1.1 - Alternate DNS server = 192.168.1.155 While browsing the internet, you go to www.cisco.com. A few minutes later, you type ping www.cisco.com into a command prompt. How will the workstation get the IP address for www.cisco.com?
Out of its local DNS cache
You have a small network as shown. Router2 is connected to the internet through a fiber optic FastEthernet connection and will be configured with NAT to provide internet connectivity to your private network. What type of address would you assign to the Fa0/1 interface on Router2?
Outside Global
You are designing a new network that will support 6,000 computers. You only have eight registered IP addresses that can be allocated to the employees for external network communication, so you decide to implement NAT and share the addresses. You want all of these computers to be able to access the internet at the same time if necessary. Which method of NAT translation should you implement?
Overloading
Listed below are several DNS record types. Match the record type on the left with its function on the right.
Points a hostname to an IPv4 address. : A Provides alternate names to hosts that already have a host record. : CNAME Points an IP address to a hostname. : PTR Points a hostname to an IPv6 address. : AAAA Identifies servers that can be used to deliver mail. : MX
During a heavy network traffic period, the maximum traffic rate is exceeded. To handle this, QoS drops all incoming traffic.Which QoS method is being used?
Policing
Which method is used by the SNMP manager when it contacts an SNMP agent and requests information about a monitored network device?
Poll
You want to make a console connection to a router using the serial port on a PC. Select the necessary components to make the console connection. Select only the necessary components.
Rollover cable Terminal emulation program Console port
You want to configure static NAT so that packets from host 192.168.2.100 will always be assigned the registered IP address 24.1.2.11 as shown. Match the missing lines with the required commands.
Router(config)#ip nat inside source static 192.168.2.100 24.1.2.11 Router(config)# interface ethernet 0 Router(config-if)#ip nat inside Router(config-if)# interface serial 0 Router(config-if)#ip nat outside
You have three hosts on network 192.168.10.0/24 as shown. If interface Fa0/0 on RouterB has the ip helper-address 172.17.10.20 configuration command in its running configuration, which of the following statements are true? (Select two.)
RouterB will forward broadcast packets sent to the: Time, DNS, BOOTP, and TFTP ports. The hosts may receive their IP address information through DHCP.
You have an office network connected to the internet as shown. The network has three subnets, all with client computers. The Web1 server on Subnet1 hosts a small website used for traveling employees. Employees must be able to contact the web server from the internet. All other hosts on the private network need to have full internet connectivity for browsing the web and sending email. On which routers should you configure NAT?
RouterC
Which SNMP component monitors individual network devices?
SNMP Agent
Which component is responsible for collecting and consolidating data from network devices that are being monitored with SNMP?
SNMP Manager
Which of the following are true regarding SNMP? (Select two.)
SNMPv3 employs the encryption of packets to prevent unauthorized sources from snooping. SNMPv2c can be compromised because the community string for authentication is sent in clear text.
You implemented SNMPv2 as a part of your overall network management plan. You configured an SNMP manager to gather traps from SNMP agents that run on monitored network devices. To secure communications between the manager and the agents, you configured a trap community name of abc123. After running the system for some time, you notice that traps containing questionable events are being sent to the SNMP manager. Upon investigation, you discover that a malicious insider has been spoofing these events, attempting to cover her tracks as she tried to compromise several network hosts. What could have been done to prevent this from happening?
SNMPv3 should have been implemented instead of SNMPv2.
Consider the following log message generated by a router: *00019: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down What is being used to identify when the message is generated?
Sequence number
You check the time on a router and find that it is off by several minutes. To fix this issue, you configure NTP on the router to get time from a Stratum 2 time provider on the internet. The time difference is large, and it is taking some time for NTP to synchronize the time on the local router. To speed synchronization, you use NTP commands to immediately synchronize the time on the router with the time on the time provider. Which NTP term best describes this process?
Slam
You check the time on a router and find that it is off by about 10 minutes. To fix this issue, you configure NTP on the router to get time from a Stratum 2 time provider on the internet. It is taking some time for NTP to synchronize the time on the local router. After about 15 minutes, the time finally synchronizes. Which NTP term best describes this process?
Slew
If dynamic DNS is being used, which of the following events will cause a dynamic update of the host records? (Select two.)
The DHCP server renews an IP address lease. The ipconfig /registerdns command is entered on a workstation.
Quality of Service (QoS) is particularly important when implementing Voice over IP (VoIP), Video over IP, online gaming, or unified communications, in which delay or data loss make the overall experience unacceptable. QoS uses certain metrics to determine communication quality. Match the names of the metrics on the left with the appropriate description on the right. (Each metric name can only be used once.)
The amount of time that passes from when a packet is sent to when it arrives. : Delay The percentage of packets that do not arrive at their destination. : Loss The variation in delay when sending multiple packets from the same device. : Jitter The capacity of a connection between two or more devices. : Bandwidth
What happens to the history table and log files when the device loses power?
The history table and log files are all lost.
You have a small network connected to the internet as shown. Which of the following statements is true? (Select two.)
The router must be configured for NAT for Srv1 to communicate on the internet. Internet hosts can reach Srv2 without NAT.
You have noticed that every two weeks or so, a client's clock is off by two minutes, even after you have adjusted it. What is this issue known as?
Time Drift
Which method is used when an SNMP agent detects that the system it monitors has exceeded a configured threshold and sends an event to the SNMP manager?
Trap
You have a small business network with a single subnet connected to the internet. Your ISP has assigned your router an IP address of 199.211.77.5 for its serial interface. You have chosen to use a network address of 172.15.1.0/24 on your private network. You use the SDM interface to configure basic NAT on the router with a single default route to the ISP. What is the most likely result of this configuration?
Your network has internet connectivity, but some websites might be unreachable.
You want to configure NAT so that packets from all hosts on network 192.168.2.0 will share the registered IP address 24.1.2.8 as shown. You have already identified the inside and outside NAT interfaces on the router. Which of the following command options will translate all inside host addresses to the single registered IP address?
access-list 1 permit 192.168.2.0 0.0.0.255 ip nat inside source list 1 interface serial 0 overload
Which SNMPv3 security level requires MD5 or SHA authentication and implements DES encryption?
authPriv
You have a Cisco router connected to a local ISP. The ISP dictates that the router use DHCP to receive its IP address and other configuration information. Which command should you use when configuring the ISP interface on the router?
ip address dhcp
You are the network administrator for a company that has a small block of registered IP addresses ranging from 24.1.2.32 to 24.1.2.47. You want to assign these addresses to a dynamic pool in NAT. Which command should you use?
ip nat pool net-1 24.1.2.32 24.1.2.47
You are configuring a router to redirect and consolidate log messages to a Syslog server. The router has multiple interfaces. However, you want all log messages being sent to the Syslog server to be seen as coming from the same IP address on the router, regardless of which interface the message actually exits the router from. Which command is used to accomplish this?
logging source-interface <interface>
You want to redirect log messages from a router to a Syslog server. The IP address of the Syslog server is 192.168.1.2. You want only serious log messages with a severity level of Emergency, Alert, or Critical to be redirected. Notification, Error, Warning, Informational, and Debug messages should not be redirected. Which commands are used to accomplish this? (Select three. All responses are part of the complete solution.)
logging trap 2 logging on logging host 192.168.1.2
You want to redirect log messages from a router to a Syslog server. The IP address of the Syslog server is 172.17.8.5. You want only serious log messages with a severity level of emergency, alert, critical, error, or warning to be redirected. Notifications and informational messages as well as debug messages should not be redirected. You just entered the logging on command. Which other commands must be used to accomplish this task? (Select two. Both responses are part of the complete solution.)
logging trap 4 logging host 172.17.8.5
Which SNMPv3 security level requires authentication with a username, but does not implement encryption?
noAuthnoPriv
Currently, all of the routers in your network are configured to use NTP to synchronize time with a public Stratum 2 time provider on the internet. To reduce redundant network traffic, you decide to configure one internal router as an authoritative NTP time provider with a stratum value of 5 and then configure all other routers to synchronize time with it. This router has an IP address of 172.17.8.254 assigned. Which commands should you use? (Select two. Each response is a part of the complete solution.)
ntp master 5 on the NTP time provider router. ntp server 172.17.8.254 on all routers except the time provider.
You check the time on a router and find that it is behind by several minutes. To fix this issue, you decide to configure NTP on the router to get time from a Stratum 2 time provider on the internet with a hostname of 0.pool.ntp.org. Which command should you use?
ntp server 0.pool.ntp.org
You check the time on a router and find that it is out of sync with the time on the other routers and switches in your network. To fix this issue, you decide to configure NTP on the router to get time from an internal authoritative (master) NTP server with an IP address of 172.17.8.254. Which command should you use?
ntp server 172.17.8.254
You need to verify that time is synchronized on a router. Which commands could you use to do this? (Select two. Each response is a complete solution.)
show ntp associations show ntp status
The following image shows a standard Object Identifier Tree structure. Based on this structure, what would the OID be for a Microsoft device?
1.3.6.1.4.1.311
A configured threshold has been exceeded by a network host that is being monitored by an SNMP agent. The agent sends a trap to its SNMP manager with a notification that the threshold has been exceeded. Which IP port does the agent use to send the trap?
162
What is the difference between a forward lookup zone and a reverse lookup? (Select two.)
A reverse lookup finds the host name from a given IP address. A forward lookup finds the IP address for a given host name.
What is true regarding the following partial output in the running configuration file? (Select two.) Router#show run ! interface fa 0/0 ip address 10.2.30.2 255.255.255.224 ! <output omitted> ! logging on logging host 10.2.30.253 logging trap 4 logging source-interface fa 0/0 !
A syslog server will receive error messages sent from 10.2.30.2. A syslog server will receive warning messages sent from 10.2.30.2.
You have a small business network with a single subnet connected to the internet through a Cisco router (RouterA). IP addresses are assigned as shown. A browser session on the workstation tries to connect to the www.westsim.com web server. What IP address and port number will the web server use as the destination address when responding to the workstation's request?
IP address 199.67.111.89 and a dynamic port assigned by RouterA
Your router generates a log message with a severity level of 1. What does this indicate?
Immediate action is needed.
