Interview Questions for CCNA Candidates with Answers- Basics II
After out Part-I, we are again with Part-II
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| CCNA Interview Questions |
What command copies router configuration from NVRAM to a file server?
copy startup-config tftp
What command assigns and enables IPX on an interface?
ipx network 4a
How does TCP provide flow control and error checking?
Acknowledgements and windowing.
Using Cisco IOS, what PPP data compression methods can be used?
Stacker and Predictor.
What command can verify Application layer connectivity?
Telnet.
What command switches from User to Privileged mode?
enable
What command will deny all telnet traffic from subnet 2.1.3.0?
deny all telnet traffic from 2.1.3.0
Which of the following exist at the Transport Layer?
LLC
IP
SQL
UDP*
ARP
What command line keyword matches Ethernet_SNAP?
snap
Among the five classes of TCP/IP addresses, how many are available to the public?
3.
After entering the command ‘router igrp 50,’ what command enables IGRP on the router for interace E1, with an address of 155.88.3.5 and a mask of 255.255.255.0?
network 157.89.0.0
In what OSI layer do EBCDIC and ASCII exist?
Presentation.
What command sets the clock rate to 64K on interface serial 2 while in interface configuration mode?
clock rate 64000
Describe the concept of Split Horizon.
It is never useful to send the same routing update packet back out the same interface that it was learned.
Given the command ‘ip route 1.1.1.1 255.255.255.255.0 1.2.1.2 12,’ what number accounts for the administrative distance?
12.
Which of the following are complications of Distance-Vector routing?
Routing loops*
Complexity of configuration
Counting to infinity*
Slow convergence*
Periodic updates slow convergence*
For less CPU strain, how should Cisco routers be configured for logging?
Syslog server routing.
Which of the following are Transport layer protocols?
NBP*
IP
TCP*
UDP*
SPX*
When would the following day banner be displayed?
‘banner motd #’
‘Howdy #’
Before login.
What command views router CPU utilization?
show processes cpu
From a Windows 95 computer, what command will backup the IOS to the local drive using tftp (provided you have a connection between the router and tftp-server)?
copy flash tftp
What command format is used for configuring a port on a 7xxx Cisco router with a VIP card?
slot/port-adapter/port.
What command enables debugging of IPX RIP updates?
debug ipx routing activity
What command enables frame relay on a router’s interface?
encapsulation frame-relay
What range of IP numbers are available for extended TCP/IP access-lists?
100-199.
What command verifies Network layer connectivity between two hosts?
Ping
What does the parameter ‘log’ do on IPX access lists?
It logs IPX access violations when packets match particular access list entries.
What OSI layer controls conversation between applications?
Session.
What function is served by the Datalink-LLC layer?
It establishes media independence, provides SAP’s, and provides flow control.
Bits are a concept essential to which OSI layer?
Physical.
In what OSI layer does IP operate?
Network.
Which TCP/IP class allows for the fewest valid Internet hosts?
Class C.
What command sets encapsulation type to PPP?
encapsulation ppp
What command starts a Cisco IOS file image upgrade?
copy tftp flash
What command changes the CDP default interval?
cdp timer 111
Which of the following are displayed by the command ‘show cdp neighbor detail’?
Hostname*
Hardware type*
Subnet mask
Flash memory available
Incoming/outgoing port*
What OSI model provides services to the Application layer via a Session layer connection?
Presentation.
What command loads the IOS from Read Only memory?
boot system rom
How does Poison Reverse alert the network of an unavailable connected network?
It sends a special routing update packet which informs all connected routers that the distance to the dead network is infinity.
Given the AppleTalk address ‘202.95’ what part it the node portion of the address?
95.
What PPP authentication types are supported by the Cisco IOS?
PAP and CHAP.
What switching type varies latency through a switch?
Store and Forward.
What ISDN specification implements Setup and Teardown?
Q-Series.
What command will deny the source address 1.2.1.2?
access list 9 deny 1.2.1.2 0.0.0.0
What LAN segmentation rule is specified by Cisco?
70% local, 30% over the router.
Which of the following operate in the OSI Session layer?
Netbios*
SQL*
NFS*
X Windows*
RPC*
TCP
What command restarts a router?
Reload
Which of the following are valid Cisco commands?
down
restart
system exit
shutdown system
snap*
What command displays Data Link Connection Identifiers?
show frame-relay pvc
What command enables round-robin style load balancing?
IPX Maximum-paths
What affect do Store and Forward switches have on latency?
They increase latency.
What encapsulation type should be used when configuring a frame-relay network between a Cisco router and a non-Cisco router?
IETF.
What is the default Cisco Encapsulation on an Ethernet interface for IPX?
novell-ether
Which of the following are true of SMTP?
It sends email*
It uses TCP*
It uses port 25*
It manages IP devices
It receives mail
What commands display previous commands?
a. Up arrow
b. show history
c. CTRL-P.
What device provides line clocking?
DCE.
What OSI layer is FRAME-RELAY mapped to?
Datalink.
What command should be used for turning off enhanced editing?
terminal no editing
In what portion of an IP address is the network portion represented?
Segment.
What command will configure Interface E0 with an IP address of 12.23.7.6 using a Subnet mask of 255.255.255.0?
ip address 12.23.7.6 255.255.255.0
What command is used to set a router’s network name?
hostname [router_name]
Which of the following operate at the OSI Network layer?
SPX
LLC
Token Ring
SQL
IPX*
What command enables load balancing over multiples paths on IPX?
ipx maximum-paths 2
What command changes to global configuration mode from within interface configuration mode?
Exit
At what telco office do customers’ local loops terminate?
CO (Central Office).
At what OSI layer do MIDI and MPEG operate?
Presentation.
Before changing your Telnet password, what command must first be executed from global configuration mode?
line vty 0 4
What command will save a configuration stored in RAM to NVRAM?
copy running-config startup-config
What term is given to the division of responsibility where the CPE ends and the local loop begins?
Demarcation.
Which of the following are true of HDLC?
Supports Stacker compression
Supports point-to-point and multipoint*
Default serial encapsulation*
Open standard
What is the default bandwidth of a serial connection?
1.544 Mbps (T1).
Which of the following are IP applications?
SMTP*
ARP
AURP
Telnet*
DNS*
What is the length of an IPX address?
80 bits: 32 bit network, 48 bit node.
Which of the following are IPX access-list functions?
Block IPX traffic*
Limit the number of Novell servers on a network
Limit the number of workstations on a network
Control SAP traffic*
What command will configure IP address 10.120.15.1 255.255.255.0?
Router(config-if)# ip address 10.120.15.1 255.255.255.0
Which OSI layer performs end to end communication, segmentation, and re-assembly?
Transport.
What command will connect access-list 101 inbound to interface e0?
Router(config-if)# ip access-group 101 in
Where is the backup configuration file stored?
In NVRAM.
Which of the following is performed by ICMP?
Transporting routing updates
Sending error and control messages*
Avoiding routing loops
Collision detection
What command will display all configured IP routing protocols?
show ip protocols
Which of the following are required for two routers using IGRP to communicate their routes?
Ethernet connection
Configured for PPP
Identical autonomous system number*
Composite metric
What encapsulation type should be selected when configuring a Cisco router to connect to a non-Cisco router across a Frame Relay network?
IETF.
What is the default IPX Ethernet encapsulation?
Novell-Ether.
What command will display the SAP table?
show ipx servers
Which of the following two items do TCP and UDP share in common?
They operate at the Network layer
They both use port numbers to identify upper level*
Both are reliable
Both are Transport protocols*
What is the maximum legal number of bits that can be borrowed from a Class C network?
6.
What command reloads a router?
Router# reload
Which of the following are not LAN technologies?
802.5
HDLC*
SDLC*
FDDI
HSSI*
Frame Relay*
Which of the following is true of full duplex?
It allows for transmission and reception of data simultaneously*
It only works in a multipoint configuration
It allows for transmission and reception of data but not simultaneously
It does not affect bandwidth
Which of the following are key features of the Cisco Discovery Protocol?
Verify connectivity*
Does not require any layer 3 protocols to be configured*
Open standard
Disabled by default
Will allow for the discovery of layer 3 addresses on neighbor routers*
What command will configure all default VTY ports?
Router(config)# line vty 0 4
What command displays the IP routing table?
show ip route
What is the access-list range for an extended IP access-list?
100-199.
What OSI layer supports the communication component of applications?
Application.
Which OSI layer incorporates the MAC address and the LLC?
Data Link.
What command shows ethernet0/1 interface status?
show interface ethernet0/1
Which of the following are characteristics of IPX RIP?
Distance vector*
Does not support multiple paths
Default encapsulation is SAP
Uses ticks and hop count as a metric*
60 second updates*
Which of the following methods will prevent routing loops?
Split horizon*
Holddown timers*
Poison reverse*
SPF algorithm
LSPs
What is the X.25 addressing standard?
X.121.
What command will configure a router to boot from an IOS located on a TFTP server?
boot system tftp IOS.exe 172.16.5.1
Which of the following is a layer 2 device?
Hub
Repeater
Switch*
Router
Which of the following are characteristics of IP RIP?
Distance vector*
60 second updates
Administrative distance of 120*
Load balancing*
Uses composite metric
What IP command tests the entire IP stack?
Telnet.
Which of the following is true regarding the user exec and privileged exec mode?
They are identical
They both require the enable password
The ‘?’ only works in priveleged exec mode
User exec is a subset of priveleged exec mode*
What 2 hardware components are used to manage and/or configure a router?
Console port and auxiliary port.
What command will display the IP host table?
show hosts
In a wildcard mask consisting of 0’s and 1’s, what is indicated by the 0 and 1 setting?
1 = no match, 0 = match.
What keystroke terminates setup mode?
Ctrl-C.
Which of the following are key features of IGRP?
Flash updates*
60 periodic updates
Poison reverse*
New horizon
Composite metric*
What switching method receives an entire frame before dispatching it?
Store and forward.
What purpose is served by DLCI?
It identifies the PVC in a Frame Relay network.
What is the default serial encapsulation?
HDLC.
Which of the following are enabled by default in IGRP’s composite metric?
Bandwidth*
Load
Delay*
MTU
Reliability
What command configures the configuration-register?
Router(config)# config-register 0x2102
What command will configure the clock rate for 56000 on a serial 0 interface?
Router(config-if)#clock rate 56000
What switching method examines the destination MAC address as the frame is being received and then begins forwarding the frame prior to receiving the entire frame?
Cut-through.
