CHAPTER-11:MANAGING REDHAT ENTERPRISE LINUX NETWORKING
CHAPTER 11
MANAGING RED HAT ENTER PRISE LINUX NETWORKING
1.      
Ping utility works at ------------ layer.
a. application
b. transport 
c. internet
d. link
2.      
A list of we ll-known and registered ports can
be found in the ------------------- file
a.       /etc/services
b.      
/etc/service
c.      
/etc/config
d.      
/etc/netconfig
3.      
When a packet is sent on the network, the
combination of the service port and IP address forms 
a.      
A connection
b.      a socket
c.      
a link
d.      
a channel
4.      
Each packet has a source socket and a
destination socket. This information can be used when 
a.       monitoring 
b.      filtering
c.      
controlling
d.      
logging
5.      
ping sends an ICMP ECHO_REQUEST packet. A
successful ping receives an ICMP ECHO_REPLY acknowledgment. An unsuccessful
ping may receive ICMP error messages
a.      
True                               b.  False
6.      
"destination unreachable" . This
message shows due to –
a.      
ICMP ECH O_REQUEST
b.      
ICMP ECHO_REPLY
c.       ICMP error messages
7.       The
netmask indicates how many bits of the IPv4 address belong to the subnet.
a.      
True                               b. False
8.      
/28  means
a.      
255.255.255.0
b.      255.255.255.240
c.      
255.255.255.224
d.      
255.255.240.0
9.      
255.255.255.252 
means
a.      
/30                         b. /25                    c.  /27                    d.  /29
10.  
Calculate the network address for
172.16.181.23/19
a.      
172.16.196.0
b.      
172.168.160.0
c.       172.16.160.0
d.      
172.16.0.160
11.  
The special address 127.0.0.1 always points to
the local system ("local host"), and the network 127.0.0.0/8 belongs
to the local system, so that it can talk to itself using network protocols.
a.      
True                                       b. False
12.  
Each host has a routing table, which tells it
how to route traffic for particular networks.
a.      
True                                       b. False
13.  
a number  is used in interface name to represent an 
a.      
Index                    b.
ID                       c. Port                   d. All
14.  
Ip  command is executed from
a.      
/bin                        b. /sbin                 c. /etc                   d. /var
15.  
To see IP Address of your system
a.      
Ip address show               b.
ifconfig                            c. ip  a  s     d. ip
addr     
e. All
16.  
To see IP Address of eth0 interface of your
system
a.      
Ip address show 
eth0    b. ifconfig  eth0                 c.
ip  a 
s   eth0       d.
All
17.  
------------ command may also be used to show
statistics about network performance
a.      
Ip                            b.
show                c. ifconfig             d. All
18.  
The received (RX) and transmitted (TX) packets,
errors, and dropped counters can be used to identify network issues caused by
congestion, low memory, and overruns
a.      
ip      link    show eth0
b.      ip    -s    link    show
eth0
c.      
ip    -s       show eth0
d.      
ip    -s    link     eth0
19.  
to show routing information.
a.      
Ip routing
b.      Ip route
c.      
Ip gateway
d.      
Ip route show
20.  
------------------  command is used to test connectivity.
a.      
ping       b. traceroute                     c. tracert              d.
ping  -s             e.
tracepath
21.  
To trace the path to a remote host, use
a.      
ping       b.
traceroute                     c.
tracert              d. ping  -s             e. tracepath
22.  
Which command is used to display socket
statistics
a.      
netstat                 b. ss       c.
st                        d. sp
23.  
Command-line and graphical tools talk to NetworkManager
and save configuration files in the – directory
a.       /etc/sysconfig/network-scripts
b.      
/etc/sysconfig/
c.      
/etc/sysconfig/networks- scripts
d.      
/etc/sysconfigd/network- scripts
24.  
To display a list of all connections, use
a.      
nmcli  con
b.      nmcli con show
c.      
nmcli 
device show
d.      
nmcli device
25.  
------------------- command can also be used to
show device status and details
a. nmcli  con 
b. nmcli con show
c. nmcli  device show
d. nmcli device
26.  
Create a new connection named "static"
and specify the IP address and gateway. Do not auto connect.
a.       nmcli   con   add   con    -name   "static"     ifname    eth0    autoconnect
   no
  type  ethernet    ip4    172.25.X.10/24    gw4    172.25.X.254 
b.      
nmcli   con   add   con    -name
  "static"     ifname       autoconnect
   no
  type  ethernet    ip4    172.25.X.10/24    gw4    172.25.X.254 
c.      
nmcli   con   add   con    "static"     ifname    eth0    autoconnect
   no
  type  ethernet    ip4    172.25.X.10/24    gw4    172.25.X.254 
27.  
An existing connection may be modified with -----------------
arguments
a.       nmcli con mod
b.      
nmcli con change
c.      
nmcli con add
28.  
To specify a DNS IP in existing  connection  
“static”
a.        nmcli   con    mod     "static"     ipv4.dns   8.8.8.8
b.      
nmcli   con   add
    "static"     ipv4.dns   8.8.8.8
c.      
nmcli   con   add
    "static"     ipv4   
dns   8.8.8.8
d.      
nmcli   con   mod
    "static"     +ipv4.dns   8.8.8.8
29.  
To specify a secondary DNS IP in existing  connection  
“static”
a.      
 nmcli   con    mod     "static"     ipv4.dns   8.8.8.8
b.      
nmcli   con   add
    "static"     ipv4.dns   8.8.8.8
c.      
nmcli   con   add
    "static"     ipv4   
dns   8.8.8.8
d.      nmcli   con   add     "static"     +ipv4.dns   8.8.8.8
30.  
Add a secondary IP address without a gateway  on existing 
interface
a.       nmcli    con     mod   
 " static"      +ipv4.addresses   10.1.1.1/16
b.      
nmcli    con     add    " static"      +ipv4.addresses   10.1.1.1/16
c.      
nmcli    con     mod     " static"      ipv4.addresses   10.1.1.1/16
d.      
nmcli    con     mod     " static"      +ipv4    
addresses   10.1.1.1/16
31.  
To Activate a connection, have to use –
a.       nmcli    con 
up  
b.      
nmcli  
con   activate
c.      
nmcli  
con    show
d.      
nmcli   
device  up
32.  
  The
nmcli command also has an interactive edit mode. For a graphical interface, use
a.      
nm-connection–edit
b.      
nm-connec–editor
c.       nm-connection–editor
d.      
nmcli-connection-editor
33.  
After modifying the configuration files, run ------------------------
to make NetworkManager read the configuration changes. The interface still needs
to be restarted for changes to take effect.
a.       nmcli   con    reload
b.      
nmcli   con    restart
c.      
nm   con    reload
d.      
nm   con    restart
34.  
As the root user, edit the /etc/sysconfig/network-
scripts/ifcfg-eth0   to add an additional
address of 10.0.0.1/24
a.       echo    "IPADDR1=10.0.0.1"   >> 
 /etc/sysconfig/networkscripts/ifcfg-eth0
b.      echo    "PREFIX1=24" >> /etc/sysconfig/network-scripts/
ifcfg-eth0
c.      
echo    "IPADDR=10.0.0.1"   >> 
 /etc/sysconfig/networkscripts/ifcfg-eth0
d.      
echo    "PREFIX=24"
>> /etc/sysconfig/network-scripts/ ifcfg-eth0
e.      
echo    "IPADDR1=10.0.0.1"   >> 
 /sysconfig/networkscripts/ifcfg-eth0
f.       
echo    "PREFIX1=24"
>> /sysconfig/network-scripts/ ifcfg-eth0
35.  
Which command displays or temporarily modifies
the system's fully qualified host name.
a.       hostname
b.      
hostnamectl
c.      
host
d.      
hosts
36.  
 A static
host name store  in the --------------- name
file
a.      
/etc/hosts
b.      
/etc/host
c.      
/etc/host-name
d.      /etc/hostname
37.  
To set permanently FQDN(mushfiq.itbd.tech), use
a.      
hostnamectl    -set-hostname  mushfiq.itbd.tech
b.      hostnamectl    set-hostname 
mushfiq.itbd.tech
c.      
hostname  
-set-hostname  mushfiq.itbd.tech
d.      
hostname    set-hostname 
mushfiq.itbd.tech
38.  
The stub resolver is used to convert host names
to IP addresses or the reverse. Which file contains this information?
a.      
/etc/host
b.      /etc/hosts
c.      
/etc/hostname
d.      
/etc/host-name
39.  
Which --------- 
command can be used to test host name (itbd)resolution with the
/etc/hosts file.
a.       getent    hosts  
itbd
b.      
getent    host  
  itbd
c.      
getents  
hosts   itbd
d.      
getent    hosts name  
itbd
40.  
nameserver: the IP address of a nameserver to
query. Up to three nameserver directives may be given to provide backups if one
is down.
a.      
True                       b. False
41.  
If DHCP is in use, /etc/resolv.conf is automatically
rewritten as interfaces are started
a.      
True                       b. False
42.  
nmcli  ->   Manage
network devices with command-line utilities
a.      
True                       b. False 
 
 
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