Interview Questions for CCNA Candidates with Answers- Basics I
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| CCNA Interview Questions |
What will happen to traffic flowing into E0, given the following standard access-list?
access-list 1 deny 1.1.1.1
access-list 1 deny 2.2.2.2
int e0
ip access-group 1 in
All IP packets will be stopped.
What Cisco command line matches the Ethernet_II encapsulation method?
Arpa
What command will load the file ‘VERN’ from the Network File server at 1.2.3.4 during the next boot?
boot system tftp VERN 1.2.3.4
What command displays IOS version?
show version
What command is used to set the Secret password?
enable secret [passwordname]
What is provided by the User Datagram Protocol?
Connectionless datagram service.
What command views IPX RIP routing updates?
debug ipx routing activity
What switching type reads only the address portion of frames before immediately forwarding them?
Cut-Through.
What command displays the IPX SAP table?
show ipx servers
What user device connects to a DCE?
DTE.
What layer manages access to the Network layer?
Datalink - LLC Sublayer.
What command enables CHAP on a serial interface using PPP?
ppp authentication chap
How does a router contact a device when its IP address, but not its MAC address is known?
It uses ARP.
What command shows all Ethernet interfaces configured for IPX?
Show ipx interface.
What command will view the ARP cache?
show arp
What command allows you to see all access-lists on Serial1 for telnet?
show ip int s1
Which of the following are examples of the Session layer?
Netbios Names*
SQL*
NFS*
X-Windows*
TCP
Which of the following are examples of the Physical Layer?
FDDI*
Token Ring*
Ethernet*
ARP
LLC
Which of the following are classful routing protocols?
EIGRP
RIP*
OSPF
IP
TCP
IGRP*
What Channel is provided by ISDN and BRI?
2B + 1D Channel.
What are the five steps of data encapsulation?
a. User information is converted into data
b. Data is converted into segments
c. Segments are converted into datagrams and packets
d. Packets are put into logical frame
e. Frames are put into bits
Of the devices available to segment a network running SNA and NetBIOS, what should never be used?
A router.
What PPP feature binds multiple channels to form a single logical channel?
multi-link ppp.
What switching technology reduces the size of a broadcast domain?
VLAN.
Which of the following operate within the Datalink Layer?
IPX
MAC*
LLC*
SQL
TCP
Which of the following operate within the Network Layer?
RARP*
DDP*
LLC
Token Ring
SPX
How many K are ISDN BRI D and B channels?
16K and 64K, respectively.
What command displays the IPX network and node address on Serial 2 interface?
show ipx int serial 2
What ranges are assigned to Class addresses A, B, and C?
Class A: 1-126
Class B: 128-191
Class C: 192-223
What command Displays RIP routing updates?
Debug IP Rip
You want to enable RIP on your router for interface E0. What command must be entered first?
router rip
What command determines the number of seconds a dialup connection will wait without traffic until hanging up?
dialer idle-timeout
What OSI layer integrates logical addressing?
Network.
In what OSI layer do bridges operate?
Datalink.
What solutions are available for Distance-Vector routing problems?
a. Defining a Maximum
b. Triggered Updates
c. Split Horizon.
What advantage is offered by LAN segmentation?
Decreased broadcasts.
What OSI layer supports optional reliability?
Transport.
Which command enables a display message when someone tries to log on to the router?
banner motd
What is the most effective solution to the distance-vector ‘count to infinity’ problem?
Defining a Maximum.
Image files like GIF, PICT, and JPEG are contained in what OSI layer?
Presentation.
What protocols are included in the OSI Network layer?
a. IP
b. IPX
c. AppleTalk
d. DECnet
What command displays the current time on a router?
show clock
What command displays Cisco Discovery Protocol adjacencies?
show cdp neighbors
What TCP/IP address class is used for multicast?
D.
What command-line keywords are valid when choosing Frame-Relay LMI types?
a. q933a
b. cisco
c. ansi
What command encrypts the enable password with strong encryption?
enable secret [password]
What technologies prevent network loops in a switched environment?
Spanning Tree Protocol and IEEE 802.ld.
How does flow control work?
A station that is being overloaded with data tells the transmitting station to stop until its buffer is clear.
At what point between the customer’s site and the phone carrier is responsibility transferred?
Demarc.
What command displays the encapsulation type of interface serial 0?
show interface s0
What OSI layer controls end-to-end communication?
Transport.
What are the five steps of data encapsulation?
a. User information is converted into data
b. The data is converted into segments
c. The segments are converted into datagrams and packets
d. The packers are put into logical frame
e. The frames are put into bits
What protocol is the address ‘2b.0012.0c83.3879’ originated from?
IPX.
What command would enable full duplex on the first port of the card in slot 3 on a Cisco Catalyst 5000?
set port duplex 3/1 full
What process uses LMI to resolve an IP address from a DLCI number?
Inverse ARP.
Which of the following WAN components are not owned by the customer?
LAN
CO*
T1 line*
DTE
What command will display Ethernet 0’s IP address?
show ip interface e0
Which of the following are contained in the OSI Application layer?
Internet Browser*
Video Game*
TCP
LLC
What methods provide login access to a router?
a. Aux
b. Console
c. Telnet
d. HTTP
Given the IPX address 4adecn3n.0000.9a33.2643, what is the network portion of the address?
4adecn3n.
What command will permit SMTP mail to only host 1.2.3.4?
access-list 102 permit tcp any host 1.2.3.4 eq smtp
Packets are a concept tied to which OSI layer?
Network.
What acronym is assigned to equipment located on the customer’s site?
CPE (Customer Premise Equipment).
What OSI layer allows Ethernet devices to identify one another at the Datalink layer?
Datalink - MAC Sublayer.
What command displays the IPX routing table?
show ipx route
What global configuration command grants access to a serial interface on a 7500?
int s 1/0/0
What features are common to ISDN BRI?
a. Multiprotocol support
b. SNMP MIB support
c. Call waiting
d. Compression
What Ethernet operation type allows only one device to transmit at a time?
Half-duplex.
What command line option determines what traffic is interesting enough for a dialup connection?
dialer-list
What global command loads an IOS file from FLASH memory on the next boot?
boot system flash [iosfilename]
What function is served by Autosense?
It allows the router to determine which LMI type a frame relay switch is using.
Which of the following operate in the OSI Physical layer?
FDDI*
Token Ring*
SQL
TCP
FDDI*
