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CCNA sy
| Question | Answer |
|---|---|
| Which component is the default storage location for the Cisco IOS? | Flash memory |
| True/False: A router searches for the IOS by default from NVRAM. | False |
| True/False: HSRP is a standard FHRP. | False |
| What three items must match for a successful EIGRP neighbor discovery process? | The AS number, K values, and authentication settings if used |
| What algorithm is used by EIGRP for selecting and maintaining the best path to each remote network? | Diffusing Update Algorithm (DUAL) |
| What is the backup HSRP router called? | Standby |
| In HSRP, what IP address should be the gateway of the hosts? | The IP address of the virtual router |
| What HSRP feature can be used to monitor the uplinks of the routers? | Interface tracking |
| What value is used to select the HSRP active router? | Priority |
| What is the default priority of an HSRP router? | 100 |
| True/False: HSRP performs true load balancing. | False |
| What syslog value indicates a normal but significant condition? | 5 |
| True/False: In VRRP, the master virtual router may have the same IP address as the virtual router group. | True |
| How often are Hello messages sent by default between GLBP routers? | Every 3 seconds |
| To what address and port number are GLBP Hellos sent? | Hello messages sent every 3 seconds to the multicast address 224.0.0.102, User Datagram Protocol (UDP) port 3222. |
| What is it called when a router with a higher priority retakes the AVG role after being down? | Preemption |
| To send messages to the VTY lines, use what command? | Terminal monitor |
| What type of syslog message has a number of 2 for the error level? | Critical |
| What is the default syslog trap level? | Informational |
| What is the severity level of notification syslog messages? | 5 |
| What version of SNMP increased security? | SNMPv3 |
| What type of SNMP message is used to retrieve information from a device? | GET |
| What version of SNMP added the GET BULK message? | SNMPv2c |
| What is the collection of information organized hierarchically and accessed by SNMP? | Management information base (MIB) |
| What Cisco IOS feature can monitor connectivity and performance in real time? | NetFlow |
| What is used to check the basic functionality of the router hardware and determines which interfaces are present? | POST |
| What is the length of the configuration register? | 16 bits |
| What command can show you the current setting of the configuration register? | show version |
| Which bit in the configuration register is used to tell the router whether to use the contents of NVRAM to load a router configuration? | Bit 6 |
| Why does Cisco uses its proprietary extension of PVST+ with STP and RSTP?? | Root bridge placement enables faster convergence as well as optimal path determination. |
| What critical component is stored in flash? | IOS |
| What command is used to download the IOS from a TFTP server to flash memory? | copy tftp flash |
| What does BPDU Guard perform? | BPDU Guard shuts down a port if a BPDU is seen on that port. |
| Which two modes enables LACP EtherChannel? | Passive, active |
| What command is used to determine the name and size of the IOS file? | show flash |
| What is an image with all feature sets available called? | Universal |
| What are version 15.0 evaluation licenses called? | Right–To–Use licenses |
| What command displays the unique device identifier (UDI) of the router, which comprises the product ID (PID) and serial number of the router? | show license udi |
| On which types of networks will OSPF elect a backup designated router? | Nonbroadcast and broadcast multi–access |
| What configuration file is stored in RAM? | Running configuration |
| What register setting tells the router to bypass the configuration in NVRAM so that you can perform password recovery? | 0x2142 |
| Which OSPF state do two routers forming an adjacency appear as in the show ip ospf neighbor output after neighbors are added into the table and hello information is exchanged? | 2WAY |
| What is the metric of a remote network as reported by an EIGRP neighbor called? | Advertised distance |
| What three items must match exactly in order for an OSPF adjacency to occur between routers? | Hello/dead timers, area, IP configuration |
| What is the metric reported by the neighbor plus the metric to the neighbor reporting the route? | Feasible distance |
| How was the following route learned? D 10.0.0.0/8 [90/2195456] via 172.16.10.2, 00:27:06,Serial0/0 | EIGRP |
| What EIGRP table contains all destinations advertised by neighboring routers, holding each destination address and a list of neighbors that have advertised the destination? | Topology table |
| EIGRP will keep up to feasible successors in the topology table in 15.0 code. | 32 |
| True/False: A feasible successor is a backup route and is stored in the topology table. | True |
| Which type of LSA is generated by DRs and referred to as network link advertisements (NLAs)? | Type 2 |
| What command will show you your unique device identifier on a router? | show license udi |
| What protocol allows you to upgrade the IOS on your router when the router is not connected to any network? | xModem |
| What command will show you the root bridge for VLAN ? | show spanning–tree vlan 10 |
| What is the bandwidth of a T3? | 44.736 Mbps |
| What is the bandwidth of an E1? | 2.048 Mbps |
| What is made up of four OC–12s bundled together and contains 8,064 DS0s for a total bandwidth of 622.08 Mbps? | An OC–48 |
| When the speed provided for both downstream and upstream connections is equal, what type of DSL is in use? | Symmetrical DSL |
| What is the name for the service that encapsulates PPP frames in Ethernet frames? | PPoE |
| What type connector is a V.35? | V.35 is a serial standard used to connect to a CSU/DSU, with speeds up to 2.048 Mb/s using a 34–pin rectangular connector |
| True/False: HDLC is the default serial encapsulation on a Cisco router. | True |
| What protocol uses LCP as one of its components? | PPP |
| True/False: Passwords are sent in clear text using CHAP. | False |
| What command is used to observe the PPP authentication process in real time? | debug ppp authentication |
| What is the bandwidth of an OC–12? | 622.08 Mbps |
| Which command will show you the local DLCI to a remote IP address? | show frame–relay map |
| Which protocol in the PPP stack provides built–in authentication methods, compression, and multilink? | LCP |
| What are the three steps in a PPP session establishment? | Link establishment, optional authentication, network layer protocol phase |
| What technology is used by traditional telephone companies to deliver advanced services (high–speed data and sometimes video) over twisted–pair copper telephone wires? | DSL |
| What structures does MPLS use to identify the path to a destination? | Labels |
| What is a signaling standard used between your router and the first Frame Relay switch it's connected to? | LMI |
| What technology uses a two–way satellite ground station with dishes available through many companies (such as Dish Network and Hughes) and connects to satellites in geosynchronous orbit? | Very Small Aperture Terminal (VSAT) |
| What is the maximum distance of DSL? | ADSL works to about18,000 feet. |
| What configuration would stop split horizon issues in a point–to–multipoint network? | Subinterfaces |
| _________ supports both voice and data at the same time, but it was created to provide more bandwidth downstream than upstream. | ADSL |
| Which protocol supports strong authentication with MD5 or SHA, providing confidentiality (encryption) and data integrity of messages via DES or DES–256 encryption between agents and managers to provide an NMS get and trap information? | SNMPv3 |
| True/False: You can enter the ACL directly in the SNMP configuration to provide security, using either a number or a name. | True |
| What command, and at which prompt, is used to enable EIGRPv6 on the Corp router in AS 10? | Corp(config) |
| To what multicast address are hello packets sent in EIGRPv6? | FF02::A |
| At what prompt is the router ID configured in EIGRPv6? | (config–rtr) |
| What command is used to determine which interfaces are part of the EIGRPv6 process? | show ipv6 eigrp interfaces |
| With IPv6, neighbor interfaces and next–hop addresses in the routing table are always what type? | Link–local |
| In the following output, what value is the feasible distance? P 2001:DB8:C34D:15::/64, 1 successors, FD is 2170112 via FE80::209:7CFF:FE51:B401 (2170112/2816), Serial0/0/1 | 2170112 |
| What address do OSPFv3 routers use to send messages to the DR? | FF02::6 |
| True/False:1.1.1.1 can be a valid router ID in OSPFv3. | True |
| What command, and at what prompt, places an interface in area 0 for process 1 using OSPFv3? | Corp(config–if) |
| What command produces this output? | |
| What type of route is the following? | |
| OI 2001:DB8:3C4D:16::/64 [110/65] via FE80::201:C9FF:FED2:5E01, Serial0/0/1 | Inter–area (if it was instead from a router in the same area, the first term would just be an O instead of OI and considered intra–area) |
| Which proprietary Cisco STP extension would put a switch port into err–disabled if a BPDU is received on this port? | PortFast with BPDU Guard |
| On what type port should PortFast not be enabled? | Connections to other switches |
| What command will you use to see information about a specific port channel interface? | show etherchannel port–channel |
| We configure the bridge priority in blocks of rather than in increments of 1 in PVST+ | 4,096 |
| True/False: The address 0000.0c07.ac0a is an HSRP address. | True |
| What is the HSRP group number in the following HSRP address? | 0000.0c07.ac0c |
| True/False: The virtual router that represents a group of routers is known as a VRRP group. | True |
| What does the configuration register setting of 2100 do when the router is rebooted? | Puts the router in ROM monitor mode |
| What command do you use to see what feature set is loaded on your router? | show license feature |
| What does the following output do when the router is rebooted? Router(config) | boot system flash c2800nm–advsecurityk9–mz.151–4.M6.bin Router(config) |
| In GLBP, when a client sends an ARP message for the gateway IP address, the AVG returns what MAC address? | The virtual MAC address of one of the AVFs |
| What is default cost of a serial interface with OSPF? | 64 |
| True/False: The reference bandwidth for OSPF and OSPFv3 is 100. | True |
| What IPv6 address is used by a client to contact a DHCP Server? | FF02::1:2 |
| How many collision domains exist when using a hub? | One |
| The ______________ part of a MAC address is assigned by the IEE to an organization and is composed of 24bits, or 3 bytes. | organizationally unique identifier (OUI) |
| On which layer of the OSI model do routers operate? | Network |
| What do IP extended access lists use as a basis for permitting or denying packets? | Source and destination addresses, source and destination ports, and protocol |
| To specify all hosts in the Class C IP network 192.16.8.0, what wildcard access list mask would you use? | 0.0.0.255 |
| What access list will allow only web traffic into network 196.15.7.0 from any client? | access–list 100 permit tcp any 196.15.7.0 0.0.0.255 eq www |
| Which router command allows you to determine whether an IP access list is enabled on a particular interface? | show ip interface |
| What router command allows you to view the entire contents of all access lists? | show access–lists |
| What causes the incrementing of runts on an interface? | Collisions |
| What is the IP extended access list range? | 100–199 and 2000–2699 |
| What is the dotted–decimal equivalent of /15? | 255.254.0.0 |
| Which command applies access list 110 inbound to an interface? | Router(config–if) |
| What is a network called that is used to allow limited access to certain resources from outside the LAN? | DMZ |
| lists use the numbers 1–99 or 1300–1999 and filter based on source IP address only. | Standard IP access |
| The block size of a /26 network is . | 64 |
| The output of the show startup–config command comes from . | NVRAM |
| What standards–based protocol works much like CDP? | Link Layer Discovery Protocol (LLDP) |
| ________ lists use the range from 100 to 199 or from 2000 to 2699. | IP extended access |
| What type of mask do routes in the routing table marked with an L have? | /32 |
| True/False: Area border routers can be in only one area at a time. | False: Any router that is member of two areas is a border router, or an area border router (ABR), by definition. |
| Which configuration mode and command combination sets the bandwidth metric of a Frame Relay connection to 64000 bps? | router(config–if) |
| True/False: Layer 2 switches and bridges are faster than routers because they don't take up time looking at the Data Link layer header information. | False |
| True/False: VLANs greatly reduce network security. | False |
| True/False: When a packet is being compared to an access list, it's always compared with each line of the access list in sequential order until it finds a match. | True |
| on an Ethernet network is the retransmission delay that's enforced when a collision occurs. | Backoff |
| What is the PDU called at the Data Link layer? | A Frame |
| What Application layer protocols sets up a secure session that's similar to Telnet? | SSH |
| What command, enabled by default starting with Cisco IOS version 12.x, allows the use of the first and last subnet in a network design? | ip subnet–zero |
| What mask yields only six IP addresses per subnet? | 255.255.255.248, or /29 |
| What prompt indicates you are at privileged mode? | router |
| Which command backs up the Cisco IOS to a TFTP server? | copy flash tftp |
| What protocol resolves IP addresses to MAC address? | ARP |
| What command provides an excellent overview of the actual operation of all currently running protocols? | show ip protocols |
| True/False: Layer 2 switches and bridges look at the frame's hardware addresses before deciding to either forward, flood, or drop the frame. | True |
| Type the command that must be present for a layer 3 switch to provide inter–VLAN routing between the two VLANs. | ip routing |
| Type the command that creates a named extended access list called 150. | ip access–list extended 150 |
| What device hosts a different subnet on each interface? | Router |
| In an Ethernet II frame, what is the function of the section labeled FCS? | Error detection |
| What mechanism is used by the client to avoid a duplicate IP address during the DHCP process? | Gratuitous ARP |
| Which type of protocol determines the path of a packet through a network: routing or routed? | Routing |
| How many subnets are contained in the network 192.168.1.0.0/27? | Eight |
| What is the HyperTerminal setting for connecting to a Cisco router? | 9600 bps, parity None, 1 stop bit, and 8 data bits |
| What type of cable is used to connect to a console port of a router? | Rolled or rollover |
| What type of Ethernet cable is used to connect from a hub to a switch? | Crossover |
| The _______________ command causes the system to return you to your previous prompt after displaying a console message. | logging synchronous |
| True/False: OSPF uses cost as a metric. | True |
| What does the configuration register setting of 0x2102 do? | Tells the router to look in NVRAM for the boot sequence |
| What IP address is called the loopback address? | 127.0.0.1 |
| Which command can be used to determine a router's capacity to generate debug output? | show processes cpu |
| True/False: OSPF is called an advanced distance–vector routing protocol. | False: EIGRP is an advanced distance–vector protocol. |
| An IPv6 address is how many bits long? | 128 |
| True/False: A routing protocol determines the path of a packet through a network. | True |
| True/False: A routed protocol is assigned to an interface and determines the method of packet delivery. | True |
| How does inter–VLAN communication take place? | Using a router or layer 3 switch |
| What is shortest possible version of 2001:0db8:3c4d:0012:0000:0000:1234:56ab? | 2001:db8:3c4d:12::1234:56ab |
| What type of IPv6 address is delivered to a single interface? | Unicast |
| What is the IEEE standard frame tagging method? | 802.1q |
| Which switching technology reduces the size of a broadcast domain? | VLANs |
| What is the main purpose of creating VLANs? | To break up broadcast domains at layer 2 |
| What is a publicly routable IPv6 address called? | Global unicast |
| What advantage is offered by LAN segmentation? | More bandwidth is provided to each user. |
| Which Class C mask can be used to provide seven subnets, each with 25 hosts? | 255.255.255.224, or /27, although it actually provides a total of eight subnets, each with 30 hosts |
| ______ break up broadcast domains in layer 2 switched networks. | Virtual LANs |
| _____________ links are used to carry VLAN information between switches. | Trunk |
| Access links carry traffic for how many VLAN? | One |
| The typical reason for creating network segmentation is to provide more to each user. | Bandwidth |
| What IPv6 address type is the equivalent of an Automatic Private IP Address (APIPPA) address? | Link–local |
| What is the binary equivalent of the decimal number 152? | 10011000 |
| What IPv6 address type is referred to as a "one–to–nearest" address? | Anycast |
| What command do you use to copy a configuration from a TFTP host to a Cisco router's DRAM on your network? | copy tftp running–config |
| Which memory in a Cisco router stores packet buffers and routing tables? | RAM |
| What IPv6 address is the equivalent of 127.0.0.1 in IPv4? | ::1 |
| What IPv6 suffix describes the multicast range? | FF00::/8 |
| Which command will show you the IOS version running on your router? | sh version |
| The basic IPv6 header contains how many fields? | Eight |
| To copy a configuration from the Cisco router's DRAM to a TFTP host on your network, what command can you use? | copy run tftp |
| If you want to suspend a Telnet session, what keystroke combination would you use? | Ctrl+Shift+6, then X |
| The ICMPv6 packet is identified by the value 58 in the _________ field, located inside the IPv6 header. | Next Header |
| What component performs the function of Address Resolution Protocol in ICMPv6? | Neighbor discovery |
| How do IPv6 hosts receive the address of the gateway? | Router solicitation |
| Which command is used to find the path a packet takes through an internetwork? | traceroute |
| Using the prefix 2001:db8:1:1/64, convert the following MAC address into a EUI–64 address: 1020:ef01:5554. | 2001:db8:1:1:1220:efff:fe01:5554 |
| When hosts make up or receive an IPv6 address, they send three _______ packets out via NDP NS asking if anyone has this same address. | duplicate address detection (DAD) |
| Which command displays Cisco Discovery Protocol adjacencies? | show cdp neighbors |
| What command will show you a directly connected router's interface IP address? | show cdp neighbor detail |
| What is the IPv6 version of OSPF called? | OSPFv3 |
| What is the Class C private IP address range? | 192.168.0.0 through 192.168.255.255 |
| You use the command to copy a configuration of a router stored on a TFTP server to a router's NVRAM. | copy tftp startup–config |
| On which types of networks will OSPF elect a backup designated router? | Non–broadcast and broadcast multi–access |
| ______________ is used to store packet buffers and routing tables, among other things. | RAM |
| What is the hex equivalent of 11000111? | C7 |
| The IPv6 address for an OSPF DR is _________ . | FF02::6 |
| The copy running–config startup–config command copies the configuration stored in___________ to _____________ . | RAM, NVRAM |
| What format of IPv6 addressing takes the unique MAC address of a host and inserts FF:FE in the middle of the address to change a 48–bit MAC address to a 64–bit interface ID? | EUI–64 address |
| To keep open multiple ____________ sessions, use the Ctrl+Shift+6, then X keystroke combination. | Telnet |
| What is the port number for Telnet? | 23 |
| What is the hex equivalent of 01110101? | 0x75. Cisco sometimes likes to show the 0x in front of hex characters. |
| The ping and traceroute commands can both be used to test _____________ in an internetwork. | IP connectivity |
| What standard allows the use of subnets masks other than the default masks? | Classless Inter–Domain Routing (CIDR) allows the use of subnet masks such as 255.255.224.0 |
| Using the prefix 2001:db8:1:1/64, convert the following MAC address into a EUI–64 address: 0b0c:abcd:1234 | 2001:db8:1:1:090c:abff:fecd:1234 |
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